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
24 Hour Hand
Chronograph
-2-Button
-Column Wheel Chronograph
--8-Column Chronograph
GMT Hand
Hacking Seconds
Hand Winding
Power Reserve Indicator
Tourbillon
Hands
Open Heart at 9:00
Brand
Audemars Piguet
Seiko
-Credor
-Seiko Instruments Inc.
--Time Module Inc.
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Two Barrel
Regulators
ETACHRON
Screwed Balance
Production Periods
2010s
2020s
Frequency
21,600 A/h
Anti-Shock
Diashock
Jewels
22
24
29
30
34
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 3:00
Column Wheel
-Column Wheel at 6:00
AP 2912
AP 2913
AP 2941
Seiko 4R38
Seiko 4R39
Seiko 4R71
Seiko 6830
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