So, this year’s 39mm steel Legend Diver has all the looks of its predecessor but with a conventional case. Somehow that twin crowned look stuck longer than the actual compressor technology. El Primero Chronomaster Power Reserve 03.2085.4021/51.C700 El Primero Chronomaster 1969 18.2040.4061/69.C494 El Primero Chronomaster 2 95.3002.3600/69.C818 El Primero Chronomaster Open 03.1260.4039 Chronomaster El Primero Open 03.2040.4061/21. Best prices for new Zenith El Primero Chronomaster. La collezione Zenith El Primero Chronomaster caratterizzata da design molto variegati e dalla presenza del celebre calibro El Primero.Questo movimento, progettato a partire dal 1962 e lanciato sul mercato nel 1969, divenne il primo calibro cronografo a carica automatica nella storia dell'orologeria. Zenith El Primero Chronomaster 1969 42mm reference. Which meant two crowns, one to change the time and one to operate the dive timer. Zenith Chronomaster El Primero Sport 03.2280.400/91.R576 BOX AND PAPERS SERVICED. by Rob Nudds Zenith are making the most of their 150th anniversary, and the Zenith El Primero Chronomaster 1969 Tour Auto Edition is the latest celebratory piece to be revealed by the brand. At the time, one of the ways they ensured this was to put the diver’s vital oxygen timing ring under the glass. A two-part case flexed with increasing water pressure to seal the case off against water ingress. Put simply, these watches exploited the natural propensity of water pressure to crush things at depth to render watch cases more waterproof. In 1969, Zenith forever changed the world of watchmaking with the unveiling of the El Primero, the world’s first automatic high-frequency chronograph calibre. Back in the late 1950s the super compressor was one of the ways watchmakers, Longines included, sought to maximize the water resistance of dive watches. ![]() If you’re used to your dive watches sporting a chunky unidirectional bezel as the sine qua non of subaquatic authenticity, it pays to look at the new Longines Legend Diver, a rethink of an equally serious though less known part of dive watch history.
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