Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
The Watch Files Podcast
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Complications
Tourbillon
Hands
Central Hour Hand
Central Minute Hand
Open Heart at 9:00
Brand
Seiko
-Credor
-Shizukuishi Watch Studio
Winding
Hand winding
Regulators
Production Periods
2010s
2020s
Frequency
21,600 A/h
Anti-Shock
Jewels
22
Balance Mount
Balance Bridge
Back-Side Features
-Barrel at 10:30
-Tourbillon at 3:00
Seiko 6830
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