Having begun research and development as early as 1962, it debuted a working prototype at a pre-emptive press conference in Switzerland in early 1969. Much of the argument has subsided in recent years, thanks to almost a decade’s tireless documentation by the original sports-chronograph collectors, such as Jeff Stein, founder of On The Dash, and author of Project 99 - The Race to Develop the World's First Automatic Chronograph.Īccording to the latter, Zenith was the first to announce the innovation. You may have to select a menu option or click a button.There has been a continuing and passionate debate as to which manufacturer developed world’s first self-winding chronograph, amongst the consortium of Heuer, Buren-Hamilton, Breitling, Dubois-Depraz and Seiko.

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Download zenith el primero a386 1969