Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Date
Hacking Seconds
Hand Winding
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Brand
Tianjin
-Sea-Gull
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
Screwed Mobile Stud
Production Periods
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
18
21
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 4:30
Central Rotor
ST1612
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