Grail Watch Reference
A Reference Library for Watches from Grail Watch
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About Grail Watch
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Complications
Date
-Quick Date Correction
Hacking Seconds
Hands
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Brand
ETA
Seiko
-Daini Seikosha
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
Production Periods
1970s
1980s
1990s
2000s
2010s
2020s
Frequency
28,800 A/h
Anti-Shock
Incabloc Double-Cone
Jewels
17
21
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 12:00
Central Rotor
Daini Seikosha 43 Qartz Stream
ETA Flatline 2890 Family
ETA 2890
ETA 2892
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