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
-2-Button
-Cam Switching Chronograph
Date
-Quick Date Correction
Day
-Quick Day Correction
Hacking Seconds
Hand Winding
Hands
12 Hour Chronograph Hand at 6:00
30 Minute Chronograph Hand at 12:00
Central 60 Second Chronograph Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 3:00
Small Seconds Hand at 9:00
Brand
ETA
-Valjoux
Seiko
-Daini Seikosha
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Uni-Directional Automatic Winding
–Clockwise Automatic Winding
Hand winding
Regulators
ETACHRON
Tadpole Regulator
Production Periods
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
21600
28800
Anti-Shock
Diashock
Incabloc Double-Cone
Jewels
17
22
24
25
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 5:00
-Balance at 7:00
ETA 7750
Seiko 5245
Seiko 5256
Seiko 6810
