Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Hacking Seconds
Hand Winding
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Brand
Audemars Piguet
Jaeger-LeCoultre
Seiko
-Credor
Vacheron Constantin
Winding
Automatic
-Bi-Directional Automatic Winding
Hand winding
Regulators
Screw Regulator
Production Periods
1940s
1950s
1960s
1970s
1980s
1990s
2000s
Frequency
18,000 A/h
28,800 A/h
Anti-Shock
Diashock
Jewels
17
18
25
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 12:00
-Balance at 4:30
-Barrel at 12:00
-Barrel at 4:30
AP 2003
Seiko 4S71
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