Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
Reference Documents
1979 Citizen Movement Table
Seiko Blue Book Automatic Movement Chronology
Seiko Laurel Brochure
Seiko List of Basic and Derivative Calibres
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Complications
Chronograph
-2-Button
-Cam Switching Chronograph
-Monopusher Chronograph
Date
-Quick Date Correction
Day
Hacking Seconds
Hands
15 Minute Chronograph Hand at 12:00
Brand
Sellita
Winding
Automatic
-Central Rotor Automatic Winding
Hand winding
Regulators
Screw Regulator
Production Periods
2010s
2020s
Frequency
28,800 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
21
25
26
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
-Balance at 1:30
SW501 a
SW501 b
SW501 BV a
SW501 BV b
SW501 BV c
SW501 c
SW501 M a
SW501 M b
SW501 M BV a
SW501 M BV b
SW501 M BV c
SW501 M c
SW501 M MP a
SW501 M MP b
SW501 M MPC a
SW501 M MPC b
SW501 MP a
SW501 MP b
SW501 MPC a
SW501 MPC b
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