Deconstruction of a Breguet "Type XXI" 3817 Chronograph

book cover for 3817.jpg
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Screenshot 2019-01-29 at 14.00.54.jpg
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book cover for 3817.jpg
Screenshot 2019-01-29 at 14.00.06.jpg
Screenshot 2019-01-29 at 14.00.24.jpg
Screenshot 2019-01-29 at 14.00.37.jpg
Screenshot 2019-01-29 at 14.00.54.jpg
Screenshot 2019-01-29 at 14.01.13.jpg

Deconstruction of a Breguet "Type XXI" 3817 Chronograph

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Summary

A modern, complex utilitarian calibre, solid, precise and well balanced with a significant mass of mechanics integrated to an effective result. Combining a strong cam system with all surrounding pieces carefully finished, including the guilloché gold automatic rotor. Many classic elements from previous chronographs have been adopted such as the cam system, but taken to a naturally higher level in relation to function, finish and assembly. The automatic mechanism likewise, taking a classic scissor automatic system consuming minimal space on the balance side of the calibre and reducing the need for lubrication by using beryllium copper and ceramic balls.