Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
GMT Hand
Tourbillon
Hands
Mode Indicator at 6:00
Brand
Audemars Piguet
Winding
Hand winding
Two Barrel
Regulators
Screwed Balance
Production Periods
Frequency
21,600 A/h
Anti-Shock
Jewels
29
Balance Mount
Balance Bridge
Back-Side Features
-Barrel at 12:00
-Barrel at 6:00
AP 2913
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