Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Date
-Big Date
-Instant Date Change
-Quick Date Correction
Hacking Seconds
Power Reserve Indicator
Hands
Big Date at 1:00
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Hour Hand at 9:00
Minute Hand at 9:00
Power Reserve Pointer at 3:00
Small Seconds Hand at 5:00
Small Seconds Hand at 6:00
Small Seconds Hand at 9:00
Brand
A. Lange & Söhne
Seiko
Zenith
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
Anti-Shock
Diashock
Jewels
24
26
27
53
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
3/4 Plate
Balance
-Balance at 1:30
-Balance at 3:00
-Balance at 4:30
-Barrel at 12:00
-Barrel at 7:30
Central Rotor
Zenith Elite
L901.0
Seiko 4S28
Zenith 661
Zenith 670
Zenith 680
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