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
Hacking Seconds
Hand Winding
Power Reserve Indicator
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Open Heart at 10:00
Power Reserve Pointer at 3:00
Brand
Seiko
-Credor
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
Production Periods
2000s
Frequency
43,200 A/h
Anti-Shock
Diashock
Jewels
41
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 2:00
Seiko 8L88
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