Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Date
-Quick Date Correction
Day
-Bilingual Day Wheel
-Outer Day Wheel
-Quick Day Correction
Hacking Seconds
Hand Winding
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 12:00
Day Window at 3:00
Open Heart at 5:00
Brand
Miyota
Rolex
Seiko
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Uni-Directional Automatic Winding
--Clockwise Automatic Winding
Regulators
Microstella
Screw Regulator
Production Periods
1980s
1990s
2000s
2010s
Frequency
28,800 A/h
36,000 A/h
Anti-Shock
Diashock
Elastor
Jewels
21
31
37
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 6:00
-Balance at 7:30
Central Rotor
Miyota 6T Series
Miyota 6T15
Miyota 6T28
Miyota 6T51
Rolex 3155
Seiko 8L55
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