Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
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Complications
Date
-Instant Date Change
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Brand
ETA
-ESA
Seiko
-Daini Seikosha
-Grand Seiko
-Suwa Seikosha
Winding
Battery
Hand winding
Regulators
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
Tuning Fork
-Tuning Fork at 10:30
Daini Seikosha 45 Stream
Ebauches SA Swissonic
ESA Mosaba
Suwa Seikosha 56 Stream
Suwa Seikosha 61 Stream
ESA 9160
Seiko 4500
Seiko 4502
Seiko 4520
Seiko 4522
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