Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Chronograph
-2-Button
-Column Wheel Chronograph
--9-Column Chronograph
-Flyback Chronograph
Date
Tourbillon
-Flying Tourbillon
Hands
30 Minute Chronograph Hand at 3:00
Central 60 Second Chronograph Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 4:30
Open Heart at 6:00
Small Seconds Hand at 9:00
Brand
Bulgari
-ESA
-Valjoux
Landeron
Winding
Battery
Hand winding
Regulators
fixed-coil contact-controlled
Gyromax
Production Periods
1950s
1960s
1970s
2020s
Frequency
18,000 A/h
21,600 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
13
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 12:00
-Balance at 3:00
-Barrel at 12:00
Column Wheel
-Column Wheel at 6:00
-Tourbillon at 6:00
BVL 268
Landeron 4750
Valjoux 230
Valjoux 234
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