Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Patent Database
Grail Watch Blog
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About Grail Watch
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Complications
Date
-Quick Date Correction
Hand Winding
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Brand
Seiko
-Grand Seiko
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
Regulators
Screw Regulator
Production Periods
2010s
2020s
Frequency
28,800 A/h
Anti-Shock
Jewels
33
Balance Mount
Balance Bridge
Back-Side Features
Balance
-Balance at 4:30
Seiko 9S25
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