Were my father still alive I would pay you nearly anything for such a model. Or would totally be inspired to work on this for his next year's birthday (he would have had his 80th bd next year).
This made me smile and in remembering cry. Thanks a ton kind stranger. It was a lovely stroll down memroy lane. I still have a few pieces from his collection that are near and dear to my heart.
As a teacher I understand how difficult it is to explain complex topics in a simple step by step way.
The site has some really impressive technical aspects, but the educational angle is the most rare and special! The simplicity of the language and explanations disguise how difficult this is to do.
This is the original use of the internet- giving away free knowledge to people, perfectly suited for the medium of a website.
The combination of straightforward explanations and clear diagrams reminds me of David Macaulay's The Way Things Work which is one of my favorite books.
While I do agree, if the author is reading the comments one piece of feedback I have is the overuse of the phrase "In this article I will...". It's a bit of a pet peeve of mine, and they use a version of the phrase three times in the first four paragraphs.
I find the convention whereby authors 'explicitly tell readers what they're going to do' a hallmark of good explanatory writing, so long as the writing is supposed to be explanatory and the author follows through.
So your comment got me to take a closer look, and yeah, the author could certainly cut "in this article" and "in this blog post" from the third and fourth paragraphs.
Otherwise, yeah, this is an excellent piece of work. Reminds of that ancient, short, black and white film from General Motors that artfully demonstrates how differentials work.
If the HN commentariat knows of similarly excellent educational work that uses intuitive visual to explain software concepts, please do share.
For JPEG compression: https://parametric.press/issue-01/unraveling-the-jpeg/#param... (anchor doesn't work for me, but it's the one with the caption "Move slider to adjust the amount of subsampling applied." which made me understand the motivation behind using chroma)
Probably my favorite thing about the author's posts is that it's all handwritten, vanilla code - as far as I can tell. It seems like all the HTML, CSS, and JS are just plain, standard, universal code. It's one of the few "advanced" sites that just works on an old iPhone 7, for example. So many modern sites that use modern frameworks just don't work anymore.
Also just a huge fan of using the existing infrastructure of browsers - even older ones - in effective ways. Browsers have been quite capable for awhile now.
I find there is something indescribably fascinating with mechanical timepieces. I'm more of a clock guy than a watch guy, though I've had plenty of watches apart, and the two disciplines merge in many places. I've learned so many new mechanical skills in my now six year journey to be able to repair these things, and to learn to repair them is to learn to make them, as you need to know how to fabricate every single piece in order to be able to repair any movement, thus why clock and watch repairers are called clockmakers and watchmakers.
I'm in a similar boat and I find it really hard to talk watches with folks who are experienced in the way of the Rolex AD.
I really enjoy cheaper vintage watches that call back to when everyone had one of them on their wrist.
Something about a semi-autonomous machine ticking away on your wrist, whether you're looking at it or not, using no electricity, is just intrinsically satisfying to me.
I got into watch servicing pre-covid, but never got into actual fabrication of parts. I mention pre-covid because it really got popular when everyone was stuck inside and there was a sudden loss of cheap ebay parts watches to pick from.
Rolex ADs are just a para-social gatekeeper for Veblen goods, but there's a huge resurgence in the entry level Swiss Automatic space with some fantastic value propositions in the likes of the enormously popular Tissot PRX 80 line (hello Rolex Land-dweller), or the more recent output from smaller marques like Christoper Ward who are producing COSC certified swiss-made watches for about 4x markup whilst Omega and the rest are jacking up prices quarter on quarter.
Yeah, it's always interesting when I run into watch guys --- my father's 27-jewel Seiko is too large for my wrist, and the date wheel is broken (and I can't find anyone willing to fix it w/o a donor watch), so I wear quite modest watches such as a Timex Indiglo, or a Seiko Solar --- folks are understanding and sympathetic and almost always have stories about repairs, or watches which they are hoping to have the chance to buy.
I've never owned a mechanical watch(did just recently buy an Orient solar watch after I lost my fitbit while traveling and after a couple weeks, realised the only feature I actually missed was having the time on my wrist), but I like watching the channel Wristwatch Revival on youtube. That guy will often repair old watches that most watchmakers won't touch, sent in by viewers, and make content out of it. And he especially loves taking on watches thathave sentimental value for the owner.
He also recently started a watch repair shop specifically catering to cases most watchmakers won't accept, might be worth checking out.
Tempting, but "Services start at $1,750" --- I could buy multiple replacements for that, or make a downpayment on the Seiko Grandmaster or GPS which I want...
That said, I'll keep it in mind and maybe if I come across a windfall will apply thusly....
For a Seiko, I'll also recommend https://www.theseikologist.com/. As his name suggests, he specializes in Seikos and has a large stock of vintage Seiko parts which are hard to source. Though, it's still not cheap. I have a broken Seiko chronograph from the 70s and he quoted $500 to just do the watch equivalent of a tune up. He can't give a better estimate without opening it up, which is understandable.
If it isn't a hardship, I do recommend fixing your dad's watch. Sentimental pieces are always special.
One of the draws of mechanical watches compared to digital is that they, in theory, can always be repaired and will last a lifetime. In reality, not so much since the cost to do maintenance or repair is astronomical compared to buying a new watch, and one that does not have any surprise costs.
I had an automatic that was my "one and done" watch - a cheap Citizen diver - I wore it 24/7 until it started losing minutes per day. While looking into who or where I could fix it, I bought a G-Shock out of curiosity and never wore a mechanical watch again.
You should have said "to buying a new cheap watch".
The average cost of maintenance and worn-out parts' replacement for a self-winding Omega (worth 7k+) was about $800 in 2020, done once every 10 years.
Wear whatever makes you happy without apology. Rolex, Timex, Apple Watch. Whatever. I find a large inverse relation between people who care about the cost of the watch you wear and people who are actually interested in the mechanical function of a watch.
I recently bought the book 'Watch Repair for Beginners' for reference (a project I slightly unwisely agreed to do).
It has some great diagrams, but obviously nothing on these interactive animations (er, naturally, since it is a book).
However the author (Harold C. Kelley) has descriptions for the diagrams similar to a maths proof - like "Warning lever W is raised in position to engage the pin P ... The unlocking lever U lifts the drop lever D ..." - not easy to follow, but maybe if you have the mechanism in front of you!
I think one of my favourite things about an automatic is that its design calls for it to be worn and not collected. If you collect them, then you'd either be wnding or shaking them when you actually want to wear them, so they aren't automatic. It forces you to wear, and therefore own, just the one, which is how it should be. I have a seiko 5 which i always wear except in the shower.
Anyone with a few auto mechanicals will tend to be a 'luxury' watch collector and almost certainly have an auto-winder watchbox or similar solution. It gets way too finnicky to constantly reset crown based Chronos, nevermind something with wheel based control like an AirKing.
Those who collect manual-winders tend towards trench watches, marriage watches converted from pocket or 1950-69 era vintage Omegas and the like - as the Timex/Hamilton/Seagull re-issues hold little cachet to a collector. The glaring recent exception being the appalling SwatchxAP collab with the hand-wound version the SISTEM51 movement, bringing the worst aspects of both manual wind movements and the unservicable and ultimately disposable nature of contemporary swatch movements.
I wear mine to sleep and that's where I get tremendous value out of it! I have small kids who are up one or more times overnight, and it's the first thing I check - is it midnight? Closer to 4am? Helps me make immediate decisions about how to handle the situation.
I love that there's not only the internals of a standard three-hand, but the automatic mechanism as well. If you're going pure mechanical, an automatic is the best way. As long as you actually move during the day the watch generally stays wound up (though a twist when you put it on is a good measure). There's a ton of great watches out there powered only by walking around, and it's fascinating to look at what they can do with that.
The mechanics of a six-hand are similar, using the mechanism that is described here for the date indicator.
Another fun device, though more from an EE POV, are the solar+radio/GPS versions of the same. Automatics can hold power for a few days and need walking around to wind. Solar needs light (any light, though sunlight is always best) and hold power for over a month. Many higher-end models can self-set over radio time or GPS signals as well.
When the world goes tits-up someday, both classes of watches will suddenly become essential, and are already essential for people who spend a good amount of time "unreachable" for work or pleasure.
Casio Oceanus S100 is made of titanium, adjusts itself over the radio[0], understands 29th of February, sets itself on/off DST, never needs tinkering or battery change, and sells for a whooping $350. It's the watch you can set all your other watches to.
[0] Don't have radio coverage where you live? "There's an app for that" -- or several -- that simulate radio control signals.
That was on my short list, but I liked the look of the Seiko SBTM339 more (though it's a JDP model so I had to import it). Citizen has a model in that range as well. Then the Seiko Astron line has both radio time and GPS models if you're willing to pay 5x as much (they do look so much nicer, though).
And I can confirm the radio time app works. (For those curious, it plays the time signal over the speaker and the faint EM from the speaker is more powerful locally than the original radio signal at distance, as well as landing on the correct frequencies.)
Sensor Watch has a temperature sensor and compensation software. It's a Casio F-91W replacement and right up there with the best temperature compensated quartz watches. Less than $100, open source software and hardware.
I have LOVED the beauty of mechanical watches my entire life. About 15 years ago, I started a little savings account to purchase an Omega Speedmaster. I have long since past the amount needed to purchase that beautiful timepiece, but I now have a wife, child, and house. The money is still there, but I cannot seem to pull the trigger. My wife says she is entirely Ok with me doing this as we are comfortable money-wise, but the "dad" in me keeps saying "You might need that money for a rainy day."
It might be worth purchasing one second hand, then most of the depreciation is already gone. If you need the money, you're likely to recoup most of it by re-selling.
I'm in a similar boat as you - from what I can tell, best bet is to buy from Chrono24, used, from a dealer with good reviews, and pay ~250 additional for chrono24's certification service in which they guarantee its authenticity.
I've been waiting for years to pull the trigger on the Speedmaster, and recently decided on the white dial one. I say decided, but mean that's the one I want but can't bring myself to click purchase :]
Huge fan of anything with the Powermatic 80. Mine gains about 3 seconds per day. I wear a Rado but I believe both Tissot and Hamilton also offer this movement.
Go for the second hand speedmaster from a reputable seller. This is the one you want and will eventually buy. If you really want to know more than you should about the watch, get the moonwatch only book. This is the bible that will help you to check everything from every version ever of the myth. Even if you don’t buy at the end, if you’re a geek I can assure you you’ll dig the content. The movements in those Tissot watches are crap, you’d be better get a serviced vintage in the 500-700 euros range than those glorified fashion watches in my opinion.
Interestingly, if you'd like to see a really cool site that showcases how these crap Tissot movements work, just click the link at the top of this page.
(The Powermatic 80 movement in the entry-level Tissot models is a modified version of ETA 2824 which Ciechanowski is showing on his site.)
As observed from a comment [1] in a previous discussion: in the first animation the time and date shown are actually correct (per your web browser) when it initially renders, though it does not increment as the seconds hand reaches 12.
I also recommend this demonstration from 1949, in that excellent style they used back then with large scale physical models and stop-motion: https://www.youtube.com/watch?v=iMW-QWPZEm0
Yes, why not. When I posted my comment, year wasn't in the title. I was very excited to see this, sent to my friend and he said to me that it's an old one. So I posted my comment to make people aware of that.
My 8yo son plays with this any chance he gets. We've started building watches together as a result (simple "drop in movement mods", but aspirations of building our own movement). The author really made something special.
What an outrageously cool and informative website. Love it.
I'm back to mostly wearing analog watches. Had an Apple Watch on my wrist for quite a long time, but something about analog appeals once more. No smartwatch beats an analog in the style department, and I see analog everywhere around me ('burbs of NYC)
I've been fascinated by mechanical watches for years. It can become a deep rabbit hole (like most hobbies). I frequently have watch restoration videos playing in the background as I'm doing things and love the process of taking apart, cleaning, and reassembling these watch movements. Wristwatch Revival is probably my favorite. I has encouraged me to tear apart a few watches of my own to give them a good service. As complex as they look, most follow a very similar process to rebuild.
When studying distributed systems you have to convince yourself
that clocks cannot be relied on. It is hard to do so because
all the clocks around me are always working just fine.
When this article was posted here earlier I got an idea that maybe
wearing a mechanical watch for a while might help.
I bought a cheap mechanical watch. It needs manual winding daily.
If you take it off your wrist it gets out of sync with the other
clocks or just stops.
Coincidentally for the last week or so I've revived my Glycine automatic as my daily wearer and I'm gauging my level of dependence on my Apple watch. So far -- hey, I wasn't all that dependent on it, and I guess, I was feeling a bit too digital. I'm going to keep going for a while this way.
This piece made me kind of fall in love with mechanical watches. The Orient Bambino I’m currently rocking on my wrist probably wouldn’t be there without it!
I've been hyper fixated on mechanical watches this year, and I'm so happy to have this resource, it's clarified my gaps, and corrected multiple misunderstandings.
My wife finds yard sale watches and has me change the battery, but then I open one, a tiny thing and it's not battery powered but there are layers of tiny tiny gears. Mind boggling. (pro tip, a "bench knife" has a tiny blade that's optimized for plying open watch cases)
If you get any cheapish mechanical watch with a widely available movement (EG an NH35 or NH36), it makes more sense not to service it, and just replace it when (if) it wears out. That's what I do with my Seikos.
A watch service costs more than a cheap watch, if you define cheap as under $300-500. If you get a Seiko or Citizen with a common movement, you can just have the movement replaced if something goes wrong. I’m not a fan of low end Swiss watches, Japan does them better.
Ineffably magnificent... no words may express how simply ingenious and incredible both the website work and such the marvel the work is attributed to...
What if schools would provide children such marvel? Yes, that requires a sufficient time to achieve, but dear... it's just... a miracle...
Be warned, once you get into mechanical watches it can be a debilitating addiction. :-). I started out with a Tag Heuer Aquaracer Professional and then sold that to buy an Omega Seamaster Diver which I love. I’m lusting for a Audemars Piguet Royal Oak but that’s a ways off.
" it may be hard to believe that merely a few decades ago the most convenient way to keep track of time was a mechanical watch."
I guess quartz is more convenient if you often take the watch off for more than a day. But my swiss automatics dont need a regular battery change, just a servicing every decade (or longer). I guess there are solar powered quartz watches though.
There are not many watch-enthusiasts on boomer generation methinks. The misery of unreliable super-expensive timekeeping raises no fond memories.
I can literally taste bile, when somebody is boasting about their ugly watch, whose only value is that some slave in China worked hundreds of hours to make it.
Because new people see it, find it fascinating, and upvote it. As it turns out, in a feed like HN's, it's easy to miss things if you don't happen to see them within a day or so of them being posted.
This made me smile and in remembering cry. Thanks a ton kind stranger. It was a lovely stroll down memroy lane. I still have a few pieces from his collection that are near and dear to my heart.
Did he ever contact you?
The site has some really impressive technical aspects, but the educational angle is the most rare and special! The simplicity of the language and explanations disguise how difficult this is to do.
This is the original use of the internet- giving away free knowledge to people, perfectly suited for the medium of a website.
So your comment got me to take a closer look, and yeah, the author could certainly cut "in this article" and "in this blog post" from the third and fourth paragraphs.
Otherwise, yeah, this is an excellent piece of work. Reminds of that ancient, short, black and white film from General Motors that artfully demonstrates how differentials work.
If the HN commentariat knows of similarly excellent educational work that uses intuitive visual to explain software concepts, please do share.
I have not gone through it yet, but this explanation of how transformers work is in the same class as Ciechanowski's work IMO: https://poloclub.github.io/transformer-explainer/
For polygon sum/union/difference: https://sean.fun/a/polygon-clipping-pt1/ (the diagram captioned "Combined Fill Annotations" at https://sean.fun/a/polygon-clipping-pt2/#annotating-segments is my favourite visual proof)
For cryptanalysis: https://random.tastemaker.design
For Fourier transforms: https://brianmcfee.net/dstbook-site/content/ch05-fourier/Sim...
For digital typesetting of Arabic: https://lr0.org/blog/p/arabic/
Also just a huge fan of using the existing infrastructure of browsers - even older ones - in effective ways. Browsers have been quite capable for awhile now.
I really enjoy cheaper vintage watches that call back to when everyone had one of them on their wrist.
Something about a semi-autonomous machine ticking away on your wrist, whether you're looking at it or not, using no electricity, is just intrinsically satisfying to me.
I got into watch servicing pre-covid, but never got into actual fabrication of parts. I mention pre-covid because it really got popular when everyone was stuck inside and there was a sudden loss of cheap ebay parts watches to pick from.
He also recently started a watch repair shop specifically catering to cases most watchmakers won't accept, might be worth checking out.
https://www.youtube.com/c/WristwatchRevival/
https://restoration.sutcliffehansen.com/
That said, I'll keep it in mind and maybe if I come across a windfall will apply thusly....
If it isn't a hardship, I do recommend fixing your dad's watch. Sentimental pieces are always special.
I had an automatic that was my "one and done" watch - a cheap Citizen diver - I wore it 24/7 until it started losing minutes per day. While looking into who or where I could fix it, I bought a G-Shock out of curiosity and never wore a mechanical watch again.
It has some great diagrams, but obviously nothing on these interactive animations (er, naturally, since it is a book).
However the author (Harold C. Kelley) has descriptions for the diagrams similar to a maths proof - like "Warning lever W is raised in position to engage the pin P ... The unlocking lever U lifts the drop lever D ..." - not easy to follow, but maybe if you have the mechanism in front of you!
Those who collect manual-winders tend towards trench watches, marriage watches converted from pocket or 1950-69 era vintage Omegas and the like - as the Timex/Hamilton/Seagull re-issues hold little cachet to a collector. The glaring recent exception being the appalling SwatchxAP collab with the hand-wound version the SISTEM51 movement, bringing the worst aspects of both manual wind movements and the unservicable and ultimately disposable nature of contemporary swatch movements.
I just don’t like the discomfort of wearing one in bed.
The mechanics of a six-hand are similar, using the mechanism that is described here for the date indicator.
Another fun device, though more from an EE POV, are the solar+radio/GPS versions of the same. Automatics can hold power for a few days and need walking around to wind. Solar needs light (any light, though sunlight is always best) and hold power for over a month. Many higher-end models can self-set over radio time or GPS signals as well.
When the world goes tits-up someday, both classes of watches will suddenly become essential, and are already essential for people who spend a good amount of time "unreachable" for work or pleasure.
[0] Don't have radio coverage where you live? "There's an app for that" -- or several -- that simulate radio control signals.
And I can confirm the radio time app works. (For those curious, it plays the time signal over the speaker and the faint EM from the speaker is more powerful locally than the original radio signal at distance, as well as landing on the correct frequencies.)
I've been waiting for years to pull the trigger on the Speedmaster, and recently decided on the white dial one. I say decided, but mean that's the one I want but can't bring myself to click purchase :]
Interestingly, if you'd like to see a really cool site that showcases how these crap Tissot movements work, just click the link at the top of this page.
(The Powermatic 80 movement in the entry-level Tissot models is a modified version of ETA 2824 which Ciechanowski is showing on his site.)
The "gateway drug" these days seems to be Tissot PRX. Their quartz models are about half the price of their mechanical ones.
[1] https://news.ycombinator.com/item?id=31261533#unv_31268444
We particularly want new cohorts of users to get acquainted with the classics :)
When users (or mods) link to previous threads, the intention is simply to share other troves of comments for curiosity gratification purposes.
Mechanical Watch (2022) - https://news.ycombinator.com/item?id=38591084 - Dec 2023 (163 comments)
Mechanical Watch - https://news.ycombinator.com/item?id=31261533 - May 2022 (413 comments)
I bought it over 10 years ago now for around £400. So not super expensive but it works perfectly for me and is a great accessory.
I'm back to mostly wearing analog watches. Had an Apple Watch on my wrist for quite a long time, but something about analog appeals once more. No smartwatch beats an analog in the style department, and I see analog everywhere around me ('burbs of NYC)
When this article was posted here earlier I got an idea that maybe wearing a mechanical watch for a while might help.
I bought a cheap mechanical watch. It needs manual winding daily. If you take it off your wrist it gets out of sync with the other clocks or just stops.
Few weeks with that clock convinced me.
https://www.youtube.com/@chronovaengineering
Very excited to get home and rebuild my keyless!
https://www.google.com/search?q=bench+knife
https://cdn11.bigcommerce.com/s-ihwnd7z21q/images/stencil/12...
https://diplomatwinders.com/cdn/shop/products/55035knife_102...
Neurospiceys tread carefully.
<3
I think this should be used in schools.
Really easy to understand and instantly captivating.
Please do more topics!!! :)
What if schools would provide children such marvel? Yes, that requires a sufficient time to achieve, but dear... it's just... a miracle...
Related: https://ciechanow.ski/archives (Bartosz Ciechanowski...)
https://www.youtube.com/watch?v=kILYJ0qFhHM
In all seriousness I should read the cameras and lenses one again; it'll be useful to me now
I can literally taste bile, when somebody is boasting about their ugly watch, whose only value is that some slave in China worked hundreds of hours to make it.
I'm not sure why this is a mystery.