Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
The Watch Files Podcast
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
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 11:00
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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