Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
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
Tourbillon
Hands
Central Hour Hand
Central Minute Hand
Open Heart at 9:00
Brand
Seiko
-Credor
-Shizukuishi Watch Studio
Winding
Hand winding
Regulators
Production Periods
2010s
2020s
Frequency
21,600 A/h
Anti-Shock
Jewels
22
Balance Mount
Balance Bridge
Back-Side Features
Balance
-Balance at 3:00
Seiko 6830
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