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The Valjoux 7750 chronograph movement

86 points by Pamar

by GhostVII

3 subcomments

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/

by yobbo

1 subcomments

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?

by rustcleaner

0 subcomment

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).

by jordanb

2 subcomments

by DeathArrow

1 subcomments

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.

by userbinator

0 subcomment

by bwanab

1 subcomments

I just have to point out that the Vallée 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.