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
Date
-Quick Date Correction
Day
-Bilingual Day Wheel
-Outer Day Wheel
-Quick Day Correction
Hacking Seconds
Hand Winding
Hands
24 Hour Hand at 9:00
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Date Window at 6:00
Day Window at 12:00
Day Window at 3:00
Open Heart at 7:00
Small Seconds Hand at 4:30
Brand
Miyota
Winding
Automatic
-Central Rotor Automatic Winding
-Uni-Directional Automatic Winding
--Clockwise Automatic Winding
--Counter-Clockwise Automatic Winding
Regulators
Production Periods
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Citizen Parashock
Jewels
21
24
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 5:00
-Balance at 7:00
Miyota 8205
Miyota 8215
Miyota 8217
Miyota 8218
Miyota 8219
Miyota 8285
Miyota 82S0
Miyota 82S5
Miyota 82S7
Miyota 8N24
Miyota 8N40
Miyota 9015
Miyota 9039
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