Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Patent Database
Grail Watch Blog
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Reference Documents
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About Grail Watch
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Complications
Tourbillon
Hands
Central Hour Hand
Central Minute Hand
Hunter Small Seconds Hand
Open Heart at 9:00
Small Seconds Hand at 6:00
Brand
Seiko
-Credor
-Shizukuishi Watch Studio
Winding
Hand winding
Regulators
Production Periods
1970s
1990s
2000s
2010s
2020s
Frequency
21,600 A/h
Anti-Shock
Jewels
22
26
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 3:00
-Balance at 7:30
-Barrel at 10:30
-Tourbillon at 3:00
Seiko 6810
Seiko 6830
Seiko 6870
Seiko 6890
Seiko 6898
Seiko 6899
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