![]() ![]() I didn't see any patent or information for it though,time will show if anything will surface from those decades. City legend says that Lemania was working on an automatic chronograph in 1947 already. Martel ebauches were in very high demand and were also utilized by Vacheron and Jaeger chronographs. However it was not that easy and they had to work on El Primero until Jan 1969 to present a prototype. Zenith's aim of this acquirement was to utilize Martel's know-how to create the first Automatic Chronograph for the centennial ( 1865-1965 ). Martel Watch Company manufactured chronograph movements for Universal Geneve and Zenith, until it was acquired by Zenith in 1959. Rolex patent is a rotating disc with city names patent, similar to those days Tissot Navigator. It was Glycine who found the form we use now. Most companies focused on rotating discs with standard mean time on it. Everyone builds up knowledge on each other's and the final stage as we know now is Glycine's ice on the cake. Glycine also didn't come up with it suddenly and solely by themselves. Starting from '40s there were already efforts in finding the optimum way to read a second time zone. Rolex fans claim that the GMT bezel is invented by Rolex, here is the proof that it is NOT. So it becomes less reliable especially given that information evolves and discoveries surface. All information in the market is a result of their fans and collectors effort. DOXA SERIAL NUMBERS SERIAL NUMBERSThe problem with Rolex is that the company is not sharing any information and has a discreet approach to their products, years, serial numbers etc. I stand for Glycine as the inventor of the first 24h rotating bezel, not Rolex as it's claimed by its fans. We were discussing in about who invented the first GMT function, whether it was Rolex or Glycine. ![]()
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