Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Chronograph
-2-Button
-Column Wheel Chronograph
--5-Column Chronograph
--6-Column Chronograph
-Monopusher Chronograph
Hands
30 Minute Chronograph Hand at 3:00
Central 60 Second Chronograph Hand
Central Hour Hand
Central Minute Hand
Small Seconds Hand at 9:00
Brand
Minerva
Winding
Hand winding
Regulators
Production Periods
1920s
1930s
1940s
1950s
1960s
1970s
1980s
Frequency
18,000 A/h
Anti-Shock
Jewels
17
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
-Balance at 12:00
-Column Wheel at 6:00
Minerva 13/20 CH
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