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
Hacking Seconds
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Brand
Miyota
Seiko
-Suwa Seikosha
Winding
Battery
Regulators
Quartz
Stepper Motor
Production Periods
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
16,384 Hz
Anti-Shock
Jewels
Balance Mount
Back-Side Features
-Battery at 11:00
Miyota 82/8N Series
Seiko 3870A
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