Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Patent Database
Grail Watch Blog
The Watch Files Podcast
Reference Documents
Vocabulary
About Grail Watch
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Complications
Hacking Seconds
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Brand
Seiko
-Grand Seiko
-Shizukuishi Watch Studio
Winding
Hand winding
Regulators
Screw Regulator
Production Periods
2010s
2020s
Frequency
28,800 A/h
Anti-Shock
Diashock
Jewels
24
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 1:30
Seiko 9S64
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