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
About Grail Watch
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Complications
Date
-Big Date
--Double Concentric Wheel Big Date
-Quick Date Correction
Day
-Quick Day Correction
Hacking Seconds
Tourbillon
Hands
Big Date at 3:00
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 3:00
Open Heart at 9:00
Small Seconds Hand at 6:00
Brand
ETA
Frédéric Piguet
Seiko
-Credor
-Seiko Instruments Inc.
--Time Module Inc.
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Regulators
ETACHRON
Production Periods
1970s
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Diashock
Incabloc Double-Cone
Jewels
22
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 12:00
-Balance at 3:00
-Balance at 7:00
ETA 2896
FP 816
Seiko 4R15
Seiko 4R16
Seiko 6810
Seiko 6830
Seiko 6870
Seiko 6890
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