Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Grail Watch Blog
Reference Documents
1979 Citizen Movement Table
Seiko Blue Book Automatic Movement Chronology
Seiko Laurel Brochure
Seiko List of Basic and Derivative Calibres
About Grail Watch
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Complications
Date
-Instant Date Change
-Quick Date Correction
Day/Night Indicator
Hacking Seconds
Power Reserve Indicator
World Time
Hands
Central Hour Hand
Central Minute Hand
Date Window at 4:30
Date Window at 6:00
Power Reserve Pointer at 1:00
Small Seconds Hand at 6:00
Small Seconds Hand at 9:00
Brand
Parmigiani Fleurier
Vaucher Manufacture
Zenith
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
-Uni-Directional Automatic Winding
Two Barrel
Regulators
Production Periods
2000s
2010s
2020s
Frequency
28,800 A/h
Anti-Shock
Jewels
28
41
Balance Mount
Balance Cock
-Balance Cock Clockwise
Back-Side Features
Balance
-Balance at 1:30
-Balance at 8:00
PF310
Zenith 687
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