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
Hand Winding
Hands
Small Seconds Hand at 4:30
Brand
Miyota
Winding
Automatic
-Central Rotor Automatic Winding
-Uni-Directional Automatic Winding
--Counter-Clockwise Automatic Winding
Regulators
Production Periods
2010s
2020s
Frequency
21,600 A/h
Anti-Shock
Citizen Parashock
Jewels
21
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 5:00
Miyota 8218
Miyota 8219
Miyota 82S5
Miyota 82S7
Miyota 8N40
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