Grail Watch Reference
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Complications
24 Hour Hand
Date
-Quick Date Correction
GMT Hand
-Independently-Adjustable 24 Hour Hand
Hacking Seconds
Hand Winding
Power Reserve Indicator
Hands
Central 24 Hour Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Power Reserve Pointer at 3:00
Small Seconds Hand at 9:00
Brand
Seiko
-Grand Seiko
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Regulators
Screw Regulator
Production Periods
1990s
2000s
2010s
2020s
Frequency
28,800 A/h
36,000 A/h
Anti-Shock
Diashock
Jewels
24
26
33
35
37
47
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 12:00
Central Rotor
Seiko 9S55
Seiko 9S61
Seiko 9S63
Seiko 9S64
Seiko 9S65
Seiko 9S66
Seiko 9S68
Seiko 9S85
Seiko 9S86
Seiko 9SA5
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