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
Date
Day
GMT Hand
Hacking Seconds
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Hunter Small Seconds Hand
Lépine Small Seconds Hand
Brand
Audemars Piguet
Bulova
ETA
-ESA
-Unitas
Jaeger-LeCoultre
Patek Philippe
Seiko
-Daini Seikosha
Vacheron Constantin
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Battery
Hand winding
Regulators
ETACHRON
Gyromax
Tuning Fork
Production Periods
1960s
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
18,000 A/h
19,800 A/h
360 Hz
Anti-Shock
Elastor
Incabloc Double-Cone
Jewels
15
17
36
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 6:00
Battery
-Battery at 4:00
Tuning Fork
-Tuning Fork at 12:00
Daini Seikosha 51 Stream
ESA Dynotron
JLC 920 Family
Accutron 218
AP 2120
ETA 6497-1
ETA 6498-1
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