[HN Gopher] The Valjoux 7750 chronograph movement
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The Valjoux 7750 chronograph movement
Author : Pamar
Score : 83 points
Date : 2024-06-25 08:41 UTC (4 days ago)
(HTM) web link (monochrome-watches.com)
(TXT) w3m dump (monochrome-watches.com)
| GhostVII wrote:
| If you are interested in more about how mechanical watches work
| in general this is a pretty amazing set of animations:
| https://ciechanow.ski/mechanical-watch/
| davidpfarrell wrote:
| That page is fricken fantastic thank you for sharing!
| ggm wrote:
| Ditto. Fantastic site.
| throw0101b wrote:
| > _https://ciechanow.ski/mechanical-watch/_
|
| From when it was released, May 2022:
|
| * https://news.ycombinator.com/item?id=31261533
|
| GPS, from January 2022:
|
| * https://ciechanow.ski/gps/
|
| * https://news.ycombinator.com/item?id=29981188
|
| Internal Combustion Engine, 2021:
|
| * https://ciechanow.ski/internal-combustion-engine/
|
| * https://news.ycombinator.com/item?id=26991300
|
| Cameras and Lenses:
|
| * https://ciechanow.ski/cameras-and-lenses/
|
| * https://news.ycombinator.com/item?id=25357315
|
| Bicycle:
|
| * https://ciechanow.ski/bicycle/
|
| * https://news.ycombinator.com/item?id=35343495
|
| Regular (re-)submissions:
|
| * https://news.ycombinator.com/from?site=ciechanow.ski
| FredPret wrote:
| That guy has unbelievable infographic pages on all sorts of
| subjects: https://ciechanow.ski/archives/
| bwanab wrote:
| I just have to point out that the Vallee de Joux (namesake of the
| Valjoux movement) is a beautiful spot in Switzerland that is
| located such that very few foreign tourists ever go there.
| Definitely worth the visit.
| davidgay wrote:
| Just avoid going there in winter, though...
| (https://weatherspark.com/compare/y/53443~286/Comparison-
| of-t...)
| userbinator wrote:
| The ETA 2836 is another very common self-winding movement.
| jordanb wrote:
| Dunno how it can be considered a "chronograph" when it has a
| lever escapement.
| readams wrote:
| A chronograph is any watch with a stopwatch complication. I'm
| really not sure what your concern with a lever escapement is,
| as this is used on almost all mechanical watches.
| jordanb wrote:
| A chronograph has a chronograph or detent escapement. The
| purpose of which is eliminate the sliding friction in the
| escapement and variability caused by viscosity change in
| lubrication with temperature.
|
| I never heard that a stopwatch makes a watch a chronometer.
| That sounds like a marketing gimmick.
| tass wrote:
| Ahould your original post read "chronometer" instead of
| chronograph? I also understand chronograph to mean a
| stopwatch complication, which is different from a
| chronometer certification.
| jordanb wrote:
| Doh yeah. It's too late.
| DeathArrow wrote:
| Even chronometer just means it passes chronometer
| specification, which for Swiss watches means that the
| movement is certified by COSC.
|
| It does not imply a particular kind of escapement.
|
| I have a Certina with ETA 2824-II and a Longines with ETA
| 2892-A2 which are inside COSC specs but not certified as
| chronometers.
| ramdac wrote:
| it has a stopwatch. It's that simple.
| DeathArrow wrote:
| 7750 and its clones like Sellita SW500 are some the workhorses of
| the watch industry. But kind of boring since they are omnipresent
| in chronographs. I'd prefer a chronograph with column wheel.
| Leyledorp wrote:
| Column-wheel chronographs generally offer a smoother, lighter
| operation than cam-action chronographs, but the chronograph
| sub-complication I'm most interested in is the vertical clutch.
| https://revolutionwatch.com/vertical-clutch-chronographs/
| rustcleaner wrote:
| I want to buy a 7751 movement, dial, hands, case, and band, and
| assemble my next watch. I have a Hamilton with a 7750 in it. It's
| about 100 parts if disassembled, and they need service about
| every half-decade (tear down, clean, lube, reassemble).
| yobbo wrote:
| Slightly off-topic; but does anyone know legitimate reasons why
| Seiko spring-drive-like movements are either very expensive or
| don't exist? And any patents should have expired by now.
|
| A spring-drive movement works by electro-magnetically braking and
| regulating a clockwork that is driven by a self-winding spring.
| The electro-magnetic brake is controlled by a quartz-clock. This
| means a watch with a smooth sweep, powerful drive, and quartz
| accuracy. It seems it would require fewer parts and less
| precision apart from the circuit itself, which shouldn't be too
| different from other quartz movements?
| aerostable_slug wrote:
| High-end watch people generally eschew quartz movements and
| anything resembling them. The occasional exceptions are for
| watches like the Omega Speedmaster X33 and Breitling Emergency,
| and even then many watch people don't want anything to do with
| them.
|
| I simply don't think the market would support the investment
| needed to pump out these movements at scale for a new player.
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(page generated 2024-06-29 23:01 UTC)