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Superb Vintage Breitling 769 Chronomat Solid 18ct Pink Gold c 1942 Very Rare | #502320674
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In 1942, Breitling created the Chronomat, the first timepiece with a circular slide rule. Based on a patent filed in 1940,… | Breitling, Vintage watches, Slide rule
1945 Breitling Chronomat Ref. 769 - HODINKEE Shop
How it Works: The Slide Rule of the Breitling Chronomat
Breitling Chronomat - a short history, part 1: The Slide Rule Chronomats | WatchUSeek Watch Forums