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
24 Hour Hand
Chronograph
-2-Button
-Column Wheel Chronograph
--5-Column Chronograph
--6-Column Chronograph
-Horizontal Clutch Chronograph
GMT Hand
-Independently-Adjustable 24 Hour Hand
Hands
30 Minute Chronograph Hand at 6:00
Brand
Bulgari
Venus
Winding
Automatic
-Peripheral Automatic Winding
Hand winding
Regulators
Production Periods
1930s
1940s
2010s
2020s
Frequency
28,800 A/h
Anti-Shock
Jewels
37
Balance Mount
Balance Bridge
Balance Cock
-Balance Cock Counter-Clockwise
Back-Side Features
-Balance at 4:30
-Column Wheel at 7:30
BVL 318
Venus 140
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