Grail Watch Reference
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Complications
24 Hour Hand
Chronograph
-2-Button
-Column Wheel Chronograph
--9-Column Chronograph
Date
Hands
12 Hour Chronograph Hand at 6:00
30 Minute Chronograph Hand at 3:00
Central 24 Hour Hand
Central 60 Second Chronograph Hand
Central Hour Hand
Central Minute Hand
Date Window at 4:30
Small Seconds Hand at 9:00
Brand
Blancpain
-Valjoux
Winding
Hand winding
Regulators
Screwed Balance
Production Periods
1950s
1960s
1970s
Frequency
21,600 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
13
17
Balance Mount
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 12:00
-Balance at 7:30
-Barrel at 1:30
Column Wheel
-Column Wheel at 6:00
Blancpain R-550
Valjoux 234
Valjoux 236
Valjoux 729
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