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v-7750 movement

The v-7750 movement that is the base movement in the Speedmaster Auto/Date is also used for many other fine timepieces. There is an expensive line of watches by the name of Ventura. Their "top-of-the-line" V-Matic collection uses the v-7750 movement in models listed as certified chronometers. I am curious as to why or how the same base movement is a certified chronometer in some watches, and not in others?

Messages In This Thread

v-7750 movement
Importance (or not) of COSC certification...
Re: v-7750 movement
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