Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Year
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Pointer at 12:00
Date Pointer at 3:00
Day Pointer at 3:00
Day Pointer at 9:00
Month Pointer at 9:00
Month Window at 12:30
Moon Phase Wheel at 6:00
Moon Phase Wheel at 9:00
Open Heart at 6:00
Year Wheel at 9:00
Year Window at 11:30
Brand
ETA
Tianjin
-Sea-Gull
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
Production Periods
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
28,800 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
21
29
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 12:00
Central Rotor
ETA 2890-9
ETA 2891-9
ST2503
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