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
-Cam Switching Chronograph
-Column Wheel Chronograph
--6-Column Chronograph
Date
-Date by Pointer
-Quick Date Correction
-Retrograde Date
Day
-Day by Pointer
-Quick Day Correction
-Retrograde Day
GMT Hand
-Independently-Adjustable 12 Hour Hand
-Independently-Adjustable 24 Hour Hand
Hacking Seconds
Hand Winding
Modular
Month
Power Reserve Indicator
Hands
Date Pointer at 6:00
Brand
Landeron
Seiko
-Credor
-Seiko Instruments Inc.
--Time Module Inc.
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Regulators
ETACHRON
Indexed
Screw Regulator
Screwed Balance
Production Periods
1950s
2000s
2010s
2020s
Frequency
18,000 A/h
21,600 A/h
28,800 A/h
Anti-Shock
Diashock
Jewels
17
28
29
31
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 12:00
-Balance at 3:00
-Balance at 5:00
Column Wheel
-Column Wheel at 6:00
Landeron 10
Landeron 185
Landeron 56
Landeron 57
Landeron 59
Landeron 80
Seiko 4R57
Seiko 4S27
Seiko 4S36
Seiko 4S76
Seiko 4S77
Seiko 6R20
Seiko 6R21
Seiko 6R24
Seiko 6R27
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