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
Date
-Instant Date Change
-Quick Date Correction
Day
-Outer Day Wheel
-Quick Day Correction
GMT Hand
-Independently-Adjustable 24 Hour Hand
Hacking Seconds
Hand Winding
Hands
Central 24 Hour Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 12:00
Small Seconds Hand at 6:00
Brand
Rolex
Seiko
-Suwa Seikosha
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Battery
Regulators
Chronergy
Microstella
Quartz
Stepper Motor
Production Periods
1960s
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
16,384 Hz
28,800 A/h
8,192 Hz
Anti-Shock
Elastor
Paraflex
Jewels
31
7
Balance Mount
Balance Bridge
Back-Side Features
Balance
-Balance at 6:00
-Battery at 6:00
Rolex 2231
Rolex 2235
Rolex 2236
Rolex 3131
Rolex 3132
Rolex 3135
Rolex 3187
Rolex 3235
Rolex 3255
Rolex 3285
Rolex 4161
Seiko 3502
Seiko 35A
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