Grail Watch Reference
A Reference Library for Watches from Grail Watch
Movement Database
Patent Database
Grail Watch Blog
The Watch Files Podcast
Reference Documents
Vocabulary
About Grail Watch
Email
Instagram
LinkedIn
Mastodon
RSS
Threads
Twitter
Complications
24 Hour Hand
Date
-Quick Date Correction
Hacking Seconds
Hand Winding
Hands
24 Hour Hand at 10:30
Brand
Seiko
-Seiko Instruments Inc.
Winding
Automatic
-Bi-Directional Automatic Winding
-Central Rotor Automatic Winding
Regulators
ETACHRON
Production Periods
2010s
2020s
Frequency
21,600 A/h
Anti-Shock
Diashock
Jewels
24
Balance Mount
Balance Cock
-Balance Cock Counter-Clockwise
Back-Side Features
Balance
-Balance at 3:00
Central Rotor
Seiko 4R37
Seiko 4R39
Sign Up for Grail Watch Updates
