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
Day
GMT Hand
Hacking Seconds
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 3:00
Brand
Bulova
Winding
Battery
Regulators
Quartz
Tuning Fork
Production Periods
1960s
1970s
Frequency
32,768 Hz
360 Hz
440 Hz
8,192 Hz
Anti-Shock
Jewels
15
Balance Mount
Back-Side Features
Battery
-Battery at 4:00
-Battery at 6:00
Tuning Fork
-Tuning Fork at 12:00
Tuning Fork at 2:00
Bulova Accutron
Accuquartz 224
Accutron 214
Accutron 218
Accutron 219
Accutron 221
Accutron 230
Beta 21
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