Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
The Watch Files Podcast
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
-Date by Pointer
-Quick Date Correction
Hacking Seconds
Hand Winding
Tourbillon
-Flying Tourbillon
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Pointer at 12:00
Date Window at 3:00
Open Heart at 6:00
Brand
Progress
Seiko
Winding
Automatic
-Bi-Directional Automatic Winding
Hand winding
Two Barrel
Regulators
Screw Regulator
Production Periods
1990s
2000s
Frequency
28,800 A/h
Anti-Shock
Diashock
Incabloc Double-Cone
Jewels
23
25
26
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 5:00
Progress 6361
Seiko 4S15
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