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Watches were produced using the "etablissage" method, where individual tradesman working out of small studios or their homes would produce parts (or sub-assemblies) which were then assembled and sold under the auspices of a single brand.In 1832, Auguste Agassiz began selling etablissage-produced watches under the name "Agassiz & Compagnie" and was particularly successful selling those watches in North America.
Albert Einstein, whose discoveries revolutionised our perception of time, frequently wore this sober, elegant timepiece. It has thus become the brand’s product that has fetched the highest price ever at auction.
What would you call this size of pocket watch though?
There is no serial number on the movement, only on the case back (inside). Can't find anything on Google for Wittnauer serial numbers. Since Longines bought out Wittnauer in 1936 I'm guessing that this is pre-1936. Wittnauer is one of the less well understood brands, and dating their watches is sometimes complicated.
On the inside it says "4 Grand Prix Paris Paris Milan Bruxelles" "G Jost Geneva" Serial is 2126137 I was also wondering what makes some Longines pocket watches more valuable than others. It is a little bigger than an 1" I can't really add too much more except that the particular form of Longines' trademarked winged hourglass mark that is found on your case (which over time did go through several changes) was first registered in St.
Imier, Switzerland by Longines on May 25, 1889, so it's consistent with the earlier 1908 serial number estimate.
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As it lacks shock protection for the balance, I would say 1940s, but not much later. ps 1: I thought I learnt and managed to understand some thing from this thread, but after I finished reading all postings, I am back to the dark. It has the name of manufacturer (except the logo as I can see some VC movements don't have cross logo too), the calibre 1003/1 and serial number on. So, was my movement made by Audemars Piguet or VC made for AP ? I read from other forums that VC made the first most slim movement right after JLC invented something that is associated to this caliber, so VC in those days, supposedly made its own movements.