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
-Column Wheel Chronograph
--9-Column Chronograph
-Flyback Chronograph
Date
-Quick Date Correction
-Semi-Instantaneous Date Change
Day
-Quick Day Correction
Hacking Seconds
Month
-Quick Month Correction
Hands
12 Hour Chronograph Hand at 6:00
30 Minute Chronograph Hand at 3:00
Central 60 Second Chronograph Hand
Central Date Pointer
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Date Window at 6:00
Day Window at 11:30
Month Window at 12:30
Small Seconds Hand at 9:00
Brand
ETA
-Valjoux
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Regulators
ETACHRON
Production Periods
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
17
21
25
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 11:00
-Balance at 12:00
-Balance at 12:30
Column Wheel
-Column Wheel at 6:00
-Column Wheel at 6:30
ETA 2600 Family
ETA 2800 Family
ETA 2650
ETA 2660
ETA 2671
ETA 2678
Valjoux 235
Valjoux 237
Valjoux 725
Valjoux 730
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