I bought a vintage chronograph with Valjoux 23. It is labeled with predial. Same type was sold by Vulcain. Predial was the label for the US.
The movement is golden with Geneva stripes. The caseback was already strong worn and the engravement wasn't good anymore. So I decided to ask my watchmaker to make a glas window in the case back. The result is pretty impressive.
Got the watch twice. So I can decide which movement I like to see
Build a watch 😀
Buy a NOS Omega Genéve case with original dial, glass, crown, hands and movement holder. Went so cheap at auction I think the seller had a bad day.
Add a cal. 601 from the spare part box, a service, remove the purple stuff and a new gasket (the old one had gone to melt down goop). Add an old Omega Corfam racing strap and you have a nice cheap for fun watch (not selling, I know its a franken 😀 )
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Ref. 2517. I was not terribly knowledgable about this reference until I was offered this beauty by a good old WIS-friend this past week. Disregard the ref. # in the ad though, but it's the same watch [and thanks to @gatorcpa for a copy of the advert]. BTW: 340 Swiss francs in 1950 is equivalent to about $3980 in 2018.