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While Coyon subsequently developed a calibre of his own design (the calibre 19)
2006 Accompanying materials: De Bethune outer leather box and inner leather case
The certificate received with this watch states the actual performance of the movement
their orientation and direction of spin direction opposing each other’s
which further sets it apart
Double Balencier | Edition Unique | White Gold size-20-x-16 While Coyon subsequently developed aHere is one of 33 examples of the Greubel Forsey Double Balancier Diffrential Constant* in a 43mm white gold case. It is a consequential watch, equipped with the brands full suite of innovations aimed at reducing positional errors, uneven amplitude, and power fade from the mainspring. The double balance architecture is one of eight key horological innovations the brand has pursued over its history as an independent maker. It is as technically
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