Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Hands
Central Hour Hand
Central Minute Hand
Brand
Jaeger-LeCoultre
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Hand winding
Regulators
Gyromax
Production Periods
1940s
1950s
1960s
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
18,000 A/h
19,800 A/h
Anti-Shock
Elastor
Jewels
17
18
36
Balance Mount
Balance Cock
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 12:00
-Balance at 6:00
-Barrel at 4:30
Central Rotor
JLC 920 Family
AP 2003
AP 2120
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