Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Patent Database
Grail Watch Blog
The Watch Files Podcast
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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 4:30
Brand
Longines
Seiko
-Daini Seikosha
Winding
Battery
Regulators
Quartz
Tuning Fork
Production Periods
1960s
1970s
Frequency
170 Hz
9,350 Hz
Anti-Shock
Jewels
Balance Mount
Back-Side Features
-Tuning Fork at 6:00
Daini Seikosha 51 Stream
Longines 6512
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