Grail Watch Reference
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Complications
24 Hour Hand
Date
-Date by Pointer
-Quick Date Correction
Day
-Day by Pointer
-Quick Day Correction
-Retrograde Day
GMT Hand
-Independently-Adjustable 24 Hour Hand
Hacking Seconds
Hand Winding
Modular
Power Reserve Indicator
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Pointer at 6:00
Date Window at 3:00
Day Pointer at 3:00
Day Window at 3:00
Hunter Small Seconds Hand
Power Reserve Pointer at 9:00
Power Reserve Pointer at 9:30
Retrograde Day Pointer at 2:30
Small Seconds Hand at 6:00
Brand
Seiko
-Credor
-Seiko Instruments Inc.
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Seiko Magic Lever Winding
Hand winding
Regulators
ETACHRON
Screw Regulator
Production Periods
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Diashock
Incabloc Double-Cone
Jewels
21
22
24
25
26
28
29
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 3:00
-Balance at 4:30
-Balance at 6:00
-Balance at 7:30
-Barrel at 10:30
-Barrel at 12:00
Central Rotor
Seiko 2L75
Seiko 4L25
Seiko 4S12
Seiko 4S15
Seiko 4S24
Seiko 4S25
Seiko 4S27
Seiko 4S28
Seiko 4S29
Seiko 6870
Seiko 6890
Seiko 6898
Seiko 6899
Seiko 6R20
Seiko 6R27
Seiko 6R35
Seiko 8L21
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