Grail Watch Reference
A Reference Library for Watches from Grail Watch
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Complications
Date
-Instant Date Change
-Quick Date Correction
Day
-Bilingual Day Wheel
-Instant Day Change
-Quick Day Correction
GMT Hand
-Independently-Adjustable 12 Hour Hand
Hacking Seconds
Hands
Central 24 Hour Hand
Central Hour Hand
Central Minute Hand
Central Seconds Hand
Date Window at 3:00
Day Window at 3:00
Brand
Seiko
-Suwa Seikosha
Winding
Battery
Regulators
Quartz
Stepper Motor
Production Periods
1970s
Frequency
16,384 Hz
32,768 Hz
Anti-Shock
Jewels
7
Balance Mount
Back-Side Features
-Battery at 10:30
Seiko 3800A
Seiko 3802A
Seiko 3803A
Seiko 3819A
Seiko 3820A
Seiko 3823A
Seiko 3862A
Seiko 3863A
Seiko 3870A
Seiko 3882A
Seiko 3883A
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