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
Date
-Date by Pointer
-Quick Date Correction
Day
-Day by Pointer
Hacking Seconds
Leap Year
Modular
Month
-Month by Pointer
Moon Phase
Perpetual Calendar
Year
Hands
Date Pointer at 3:00
Brand
Chronoswiss
Sellita
Tianjin
-Sea-Gull
Vaucher Manufacture
Winding
Automatic
-Central Rotor Automatic Winding
-Micro-Rotor Automatic Winding
-Uni-Directional Automatic Winding
--Counter-Clockwise Automatic Winding
Hand winding
Regulators
ETACHRON
Screw Regulator
Variable Inertia Blocks
Production Periods
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
24
29
30
31
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
-Balance at 12:00
Chronoswiss C.127
ST2503
SW295-1
SW295-1 M
VMF 5401/50
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