I would appreciate your input in what ' Sertissages ' in watches, exactly means. I've searched and got some French definitions but translating doesn't help a lot.Is it some dial work/decorating related thing?
The definition in question is actually about this ad from 1928, related to the brand I am collecting.
And one more question:
Was Kelek involved in the automatic chrono coalition ( Heuer, Breitling, Buren, Depraz ), was it related with Breitling in those times also? Just wondering if there is Kelek contribution into those Cal 11- 15 chronos.