Grail Watch Reference
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Complications
Date
-Big Date
-Quick Date Correction
Hacking Seconds
Hand Winding
Power Reserve Indicator
Repeater
Hands
Power Reserve Pointer at 3:00
Brand
A. Lange & Söhne
Parmigiani Fleurier
Seiko
-Credor
-Grand Seiko
-Shizukuishi Watch Studio
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Two Barrel
Regulators
Screw Regulator
Swan Neck Regulator
Production Periods
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
43,200 A/h
Anti-Shock
Diashock
Jewels
33
38
41
53
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
3/4 Plate
Balance
-Balance at 1:30
-Balance at 3:00
Central Rotor
L901.0
PF357
Seiko 8L88
Seiko 9S63
Seiko 9S67
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