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
Chronograph
-2-Button
-Cam Switching Chronograph
-Modular Chronograph
-Vertical Clutch Chronograph
Date
-Quick Date Correction
Day
-Quick Day Correction
Hacking Seconds
Hand Winding
Hands
12 Hour Chronograph Hand at 6:00
30 Minute Chronograph Hand at 9:00
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 3:00
Small Seconds Hand at 12:00
Brand
ETA
-ESA
Seiko
-Daini Seikosha
-Grand Seiko
-Suwa Seikosha
Winding
Automatic
-Bi-Directional Automatic Winding
Battery
Regulators
Quartz
Stepper Motor
Tadpole Regulator
Tuning Fork
Production Periods
1960s
1970s
Frequency
16,384 Hz
28,800 A/h
300 Hz
Anti-Shock
Diashock
Jewels
12
23
25
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 5:00
-Battery at 11:00
-Battery at 3:00
Tuning Fork
-Tuning Fork at 11:00
Daini Seikosha 39 Quartz Stream
Daini Seikosha 52 Stream
ESA Mosaba
Suwa Seikosha 38 Quartz Stream
Suwa Seikosha 56 Stream
ESA 9162
ESA 9164
ESA 9210
Seiko 3870A
Seiko 5216
Seiko 5245
Seiko 5256
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