Grail Watch Reference
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Complications
24 Hour Hand
Date
-Date by Pointer
-Quick Date Correction
Day
-Quick Day Correction
-Retrograde Day
GMT Hand
-Independently-Adjustable 12 Hour Hand
-Independently-Adjustable 24 Hour Hand
Hacking Seconds
Hand Winding
Power Reserve Indicator
Tourbillon
Hands
24 Hour Hand at 9:00
Central 24 Hour Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Pointer at 6:00
Date Window at 3:00
Lépine Small Seconds Hand
Open Heart at 10:00
Open Heart at 9:00
Power Reserve Pointer at 3:00
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
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Seiko Magic Lever Winding
Hand winding
Regulators
Screw Regulator
Production Periods
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
36,000 A/h
43,200 A/h
Anti-Shock
Diashock
Incabloc Double-Cone
Jewels
20
22
25
26
27
28
31
37
41
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 4:30
-Balance at 6:00
-Barrel at 10:30
-Barrel at 12:00
Central Rotor
-Tourbillon at 3:00
Seiko 4L75
Seiko 4S35
Seiko 4S36
Seiko 4S71
Seiko 4S76
Seiko 4S77
Seiko 4S79
Seiko 6830
Seiko 6L35
Seiko 6L75
Seiko 8L34
Seiko 8L35
Seiko 8L36
Seiko 8L38
Seiko 8L55
Seiko 8L75
Seiko 8L88
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