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
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Complications
Hands
Open Heart at 9:00
Brand
Winding
Regulators
Production Periods
Frequency
Anti-Shock
Jewels
Balance Mount
Back-Side Features
AP 2912
AP 2913
AP 2941
Seiko 4R38
Seiko 4R39
Seiko 4R71
Seiko 6830
