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
--9-Column Chronograph
Date
Hands
12 Hour Chronograph Hand at 6:00
30 Minute Chronograph Hand at 3:00
Central 24 Hour Hand
Central 60 Second Chronograph Hand
Central Hour Hand
Central Minute Hand
Date Window at 4:30
Small Seconds Hand at 9:00
Brand
-Valjoux
Seiko
-Suwa Seikosha
Winding
Hand winding
Regulators
Production Periods
1970s
Frequency
21,600 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
13
17
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 12:00
Column Wheel
-Column Wheel at 6:00
Suwa Seikosha 41 Quartz Stream
Valjoux 234
Valjoux 236
Valjoux 729
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