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
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Complications
Chronograph
-Column Wheel Chronograph
--6-Column Chronograph
-Monopusher Chronograph
-Split Seconds Chronograph
Date
Day
GMT Hand
Hacking Seconds
Hands
30 Minute Chronograph Hand at 3:00
Central 60 Second Chronograph Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Central Split Second Chronograph Hand
Small Seconds Hand at 9:00
Brand
Bulova
-Valjoux
Winding
Battery
Hand winding
Regulators
Tuning Fork
Production Periods
1910s
1920s
1930s
1940s
1950s
1960s
1970s
Frequency
18,000 A/h
360 Hz
Anti-Shock
Jewels
15
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Battery
-Battery at 4:00
Tuning Fork
-Tuning Fork at 12:00
Accutron 218
Valjoux 24 KV
Valjoux 57
Valjoux 7
Valjoux 8 KL
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