Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Date
Day
GMT Hand
Hacking Seconds
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Hunter Small Seconds Hand
Lépine Small Seconds Hand
Small Seconds Hand at 6:00
Small Seconds Hand at 9:00
Brand
Audemars Piguet
Bulova
ETA
-ESA
-Unitas
Jaeger-LeCoultre
Patek Philippe
Seiko
-Daini Seikosha
-Suwa Seikosha
Vacheron Constantin
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Battery
Hand winding
Regulators
ETACHRON
Gyromax
Quartz
Stepper Motor
Tuning Fork
Production Periods
1960s
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
16,384 Hz
18,000 A/h
19,800 A/h
360 Hz
8,192 Hz
Anti-Shock
Elastor
Incabloc Double-Cone
Jewels
15
17
36
7
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 6:00
Battery
-Battery at 4:30
-Battery at 6:00
Central Rotor
Tuning Fork
-Tuning Fork at 12:00
Daini Seikosha 51 Stream
ESA Dynotron
JLC 920 Family
Suwa Seikosha 35 Quartz Stream
Accutron 218
AP 2120
ETA 6497-1
ETA 6498-1
Seiko 35A
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