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
Date
-Quick Date Correction
Day
-Bilingual Day Wheel
-Quick Day Correction
Hacking Seconds
Hand Winding
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 3:00
Brand
Audemars Piguet
Bulova
IWC
Longines
Omega
Patek Philippe
Rado
Rolex
Seiko
-Daini Seikosha
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Battery
Regulators
Gyromax
Quartz
Screw Regulator
Tuning Fork
Production Periods
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
440 Hz
8,192 Hz
Anti-Shock
Diashock
Jewels
23
36
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 5:00
-Balance at 6:00
-Battery at 6:00
Tuning Fork
Tuning Fork at 2:00
Daini Seikosha 52 Stream
Accutron 230
AP 2121
Beta 21
Seiko 5206
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