Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
24 Hour Hand
Date
-Instant Date Change
-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
-Grand Seiko
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Regulators
Screw Regulator
Production Periods
1960s
1970s
1990s
2000s
2010s
2020s
Frequency
28,800 A/h
36,000 A/h
Anti-Shock
Diashock
Jewels
24
25
26
33
35
37
41
47
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 12:00
-Balance at 3:00
-Balance at 4:30
Central Rotor
Daini Seikosha 45 Stream
Seiko 9S5x Family
Seiko 9S6x Family
Seiko 9S8x Hi-Beat Family
Seiko 9SA Family
Suwa Seikosha 56 Stream
Suwa Seikosha 61 Stream
Seiko 4520
Seiko 4522
Seiko 4580
Seiko 9S25
Seiko 9S55
Seiko 9S63
Seiko 9S64
Seiko 9S65
Seiko 9S66
Seiko 9S67
Seiko 9S68
Seiko 9S85
Seiko 9S86
Seiko 9SA5
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