Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
The Watch Files Podcast
Reference Documents
About Grail Watch
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Complications
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Brand
Seiko
-Daini Seikosha
-Grand Seiko
Winding
Hand winding
Regulators
Screw Regulator
Production Periods
1960s
1970s
Frequency
36,000 A/h
Anti-Shock
Jewels
25
Balance Mount
Balance Bridge
Back-Side Features
Balance
-Balance at 3:00
Seiko 4580
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