Seiko Majesta

cal. 9063

Factory Spec. 20 SPY

Thermoinsensitive: High Frequency (196 kHz) + Special Cut Resonator with Flexural and Torsional Modes

User Adjustable: Yes

This is an interesting watch because it represents Seiko's brief experiment with 'Twin Mode' quartz - the use of a special cut of crystal that combines both flexural and torsional modes in one resonator. This paper, dating from 1980, may also suggest that the XO in the Majesta is HF, although I have no documentation on this particular watch and no way to test the frequency of its quartz crystal. While Seiko ultimately let 'Twin Mode' quartz fall by the wayside, Bulova picked up the technology when the patent expired and incorporated it in their Accutron II and Precisionist lines, along with a new, three-pronged crystal design.


Some details for this watch are missing because it has not yet undergone comprehensive testing.

Parent Company Seiko Holdings Corporation
Brand Seiko
Model Series Twin Mode Quartz
Model Name Majesta
Model Number unknown
Case Number 5020
Serial Number 510479
Approx. Date of Manufacture January 1985
Calibre (mvt maker) 9063
Calibre (brand) 9063
Factory SPY 20
TC Appproach Twin mode (and HF)
Frequency (XO 1) 196 kHz (assumed)
Frequency (XO 2) n/a
Rate Adjustment User
Major Inhibition Period unknown
Minor Inhibition Period unknown
Power Disposable cell
Cell Number SR920SW
Case Back Press (no tool needed for closing)
Water Resistance unknown
Features 3-hand, no numeral dial
  Day, date (not perpetual)
Timing Results Basic data  &  Further details
Images Photos - Large File Sizes!