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
24 Hour Hand
Date
-Date by Pointer
-Quick Date Correction
-Retrograde Date
Day
-Bilingual Day Wheel
-Day by Pointer
-Quick Day Correction
-Retrograde Day
Hacking Seconds
Hand Winding
Power Reserve Indicator
Hands
24 Hour Hand at 10:30
Central Hour Hand
Central Minute Hand
Central Power Reserve Pointer
Central Seconds Hand
Date Pointer at 6:00
Date Window at 3:00
Day Pointer at 3:00
Day Window at 3:00
Open Heart at 9:00
Power Reserve Pointer at 9:00
Power Reserve Pointer at 9:30
Brand
-Seiko Instruments Inc.
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Seiko Magic Lever Winding
Regulators
ETACHRON
Production Periods
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Diashock
Jewels
21
22
23
24
29
31
Balance Mount
Balance Cock
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 3:00
Seiko 4R Family
Seiko 6R Family
Seiko 7S Family
Seiko 8R Family
Seiko 4R15
Seiko 4R16
Seiko 4R35
Seiko 4R36
Seiko 4R37
Seiko 4R38
Seiko 4R39
Seiko 4R57
Seiko 4R71
Seiko 6R15
Seiko 6R20
Seiko 6R21
Seiko 6R24
Seiko 6R27
Seiko 7S25
Seiko 7S26
Seiko 7S35
Seiko 7S36
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