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
Small Seconds Hand at 6:00
Brand
Seiko
Zenith
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
Screw Regulator
Production Periods
2000s
Frequency
28,800 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
25
31
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 6:00
-Barrel at 7:30
Central Rotor
Seiko 4L25
Zenith 67
Zenith 689
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