The Valjoux 7750 chronograph movement

If you are interested in more about how mechanical watches work in general this is a pretty amazing set of animations: <a href="https:&#x2F;&#x2F;ciechanow.ski&#x2F;mechanical-watch&#x2F;" rel="nofollow">https:&#x2F;&#x2F;ciechanow.ski&#x2F;mechanical-watch&#x2F;</a>

Slightly off-topic; but does anyone know legitimate reasons why Seiko spring-drive-like movements are either very expensive or don&#x27;t exist? And any patents should have expired by now.<p>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&#x27;t be too different from other quartz movements?

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&#x27;s about 100 parts if disassembled, and they need service about every half-decade (tear down, clean, lube, reassemble).

Dunno how it can be considered a &quot;chronograph&quot; when it has a lever escapement.

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&#x27;d prefer a chronograph with column wheel.

The ETA 2836 is another very common self-winding movement.

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.