Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Date
-Quick Date Correction
Hacking Seconds
Hand Winding
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Brand
ETA
Frédéric Piguet
Seiko
-Credor
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Uni-Directional Automatic Winding
--Clockwise Automatic 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
20
25
29
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 4:30
-Barrel at 12:00
Central Rotor
ETA 2000-1
FP 615
Seiko 4S15
Seiko 4S71
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