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
-Big Date
-Instant Date Change
-Quick Date Correction
Hacking Seconds
Power Reserve Indicator
Hands
Big Date at 1:00
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Hour Hand at 9:00
Minute Hand at 9:00
Power Reserve Pointer at 3:00
Small Seconds Hand at 5:00
Small Seconds Hand at 6:00
Small Seconds Hand at 9:00
Brand
A. Lange & Söhne
Seiko
Zenith
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Two Barrel
Regulators
Screw Regulator
Swan Neck Regulator
Production Periods
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Diashock
Jewels
24
26
27
53
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 4:00
-Balance at 5:00
Zenith Elite
L901.0
Seiko 4S28
Zenith 661
Zenith 670
Zenith 680
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