Grail Watch Reference
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Complications
24 Hour Hand
Date
-Date by Pointer
-Quick Date Correction
-Retrograde Date
Day
-Bilingual Day Wheel
-Day by Pointer
-Quick Day Correction
-Retrograde Day
GMT Hand
-Independently-Adjustable 12 Hour Hand
-Independently-Adjustable 24 Hour Hand
Hacking Seconds
Hand Winding
Modular
Power Reserve Indicator
Hands
24 Hour Hand at 10:30
24 Hour Hand at 9:00
Central 24 Hour Hand
Central Hour Hand
Central Minute Hand
Central Power Reserve Pointer
Central Seconds Hand
Date Pointer at 6:00
Date Window at 3:00
Day Pointer at 3:00
Day Window at 3:00
Open Heart at 10:00
Open Heart at 9:00
Power Reserve Pointer at 3:00
Power Reserve Pointer at 9:00
Power Reserve Pointer at 9:30
Retrograde Day Pointer at 2:30
Small Seconds Hand at 6:00
Small Seconds Hand at 9:00
Brand
Seiko
-Credor
-Daini Seikosha
-Grand Seiko
-Seiko Instruments Inc.
--Time Module Inc.
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Seiko Magic Lever Winding
Hand winding
Regulators
ETACHRON
Screw Regulator
Tadpole Regulator
Production Periods
1970s
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
36,000 A/h
43,200 A/h
Anti-Shock
Diashock
Jewels
21
22
23
24
25
26
27
28
29
31
33
35
37
41
47
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 12:00
-Balance at 3:00
-Balance at 4:30
-Balance at 6:00
-Barrel at 12:00
Central Rotor
Seiko 4R15
Seiko 4R16
Seiko 4R35
Seiko 4R36
Seiko 4R37
Seiko 4R38
Seiko 4R39
Seiko 4R57
Seiko 4R71
Seiko 4S12
Seiko 4S15
Seiko 4S24
Seiko 4S25
Seiko 4S27
Seiko 4S28
Seiko 4S29
Seiko 4S35
Seiko 4S36
Seiko 4S71
Seiko 4S76
Seiko 4S77
Seiko 4S79
Seiko 5206
Seiko 5216
Seiko 5245
Seiko 5246
Seiko 5256
Seiko 6L35
Seiko 6R15
Seiko 6R20
Seiko 6R21
Seiko 6R24
Seiko 6R27
Seiko 7S25
Seiko 7S26
Seiko 7S35
Seiko 7S36
Seiko 8L21
Seiko 8L35
Seiko 8L36
Seiko 8L38
Seiko 8L55
Seiko 8L75
Seiko 8L88
Seiko 9S55
Seiko 9S61
Seiko 9S63
Seiko 9S64
Seiko 9S65
Seiko 9S66
Seiko 9S67
Seiko 9S68
Seiko 9S85
Seiko 9SA5
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