Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
24 Hour Hand
Date
-Date by Pointer
-Quick Date Correction
Day
-Bilingual Day Wheel
-Quick Day Correction
Hacking Seconds
Hand Winding
Power Reserve Indicator
Hands
24 Hour Hand at 10:30
Central Hour Hand
Central Minute Hand
Central Power Reserve Pointer
Central Seconds Hand
Date Pointer at 6:00
Date Window at 3:00
Day Window at 3:00
Open Heart at 9:00
Brand
Seiko
-Seiko Instruments Inc.
--Time Module Inc.
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
ETACHRON
Production Periods
2000s
2010s
2020s
Frequency
21,600 A/h
Anti-Shock
Diashock
Jewels
22
23
24
29
Balance Mount
Balance Cock
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 3:00
Central Rotor
Seiko 4R15
Seiko 4R16
Seiko 4R35
Seiko 4R36
Seiko 4R37
Seiko 4R38
Seiko 4R39
Seiko 4R57
Seiko 4R71
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