Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
Reference Documents
1979 Citizen Movement Table
Seiko Blue Book Automatic Movement Chronology
Seiko Laurel Brochure
Seiko List of Basic and Derivative Calibres
About Grail Watch
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Complications
GMT Hand
Tourbillon
Hands
24 Hour Window at 3:00
Central Hour Hand
Central Minute Hand
Mode Indicator at 6:00
Open Heart at 9:00
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
AP 2913
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