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
-Outer Day Wheel
Hands
Central 24 Hour Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 12:00
Brand
ETA
Miyota
Rolex
Sellita
Soprod
STP
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Uni-Directional Automatic Winding
--Counter-Clockwise Automatic Winding
Hand winding
Regulators
Chronergy
ETACHRON
Microstella
Screw Regulator
Soprod
Production Periods
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Citizen Parashock
Elastor
Incabloc Double-Cone
Novodiac
Paraflex
Jewels
19
21
25
26
27
31
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 12:00
-Balance at 5:00
-Balance at 6:00
ETA 2834-2
Miyota 8285
Rolex 3055
Rolex 3155
Rolex 3156
Rolex 3255
Soprod C135
STP4-13
SW240-1
SW240-1 M
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