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
Date
-Instant Date Change
-Quick Date Correction
Hacking Seconds
Hand Winding
Power Reserve Indicator
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Open Heart at 10:00
Power Reserve Pointer at 3:00
Brand
Claro
Seiko
-Credor
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
Production Periods
2000s
Frequency
21,600 A/h
43,200 A/h
Anti-Shock
Diashock
Incabloc Double-Cone
Jewels
18
41
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 2:00
-Balance at 4:30
Claro CL-888
Seiko 8L88
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