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. A high-frequency movement capable of measuring 1/10th of a second like the 1969 version, the new generation El Primero 3600 calibre features a stop-seconds device and an increased power. Which meant two crowns, one to change the time and one to operate the dive timer. The Chronomaster 2 Special 50th Anniversary Edition is a limited edition of 250 titanium watches (in blue and black) with a redesigned El Primero 3600 Calibre. At the time, one of the ways they ensured this was to put the diver’s vital oxygen timing ring under the glass. ZENITH El Primero Chronomaster Power Reserve 03.2080.4021 Mens Watch G0727 Quantity. 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. 2,145 likes, 17 comments - teddybaldassarre on December 8, 2023: 'The Zenith Chronomaster Sport borrows iconic design elements from the past like the tri-colored s. 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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