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
-Retrograde Day
Hands
24 Hour Hand at 9:00
Central 24 Hour Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Pointer at 6:00
Day Pointer at 3:00
Power Reserve Pointer at 9:30
Retrograde Day Pointer at 2:30
Brand
Seiko
-Credor
-Seiko Instruments Inc.
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
ETACHRON
Screw Regulator
Production Periods
2000s
2010s
2020s
Frequency
28,800 A/h
Anti-Shock
Diashock
Jewels
28
31
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 3:00
-Balance at 5:00
Seiko 4S27
Seiko 4S36
Seiko 4S76
Seiko 4S77
Seiko 6R24
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