Seiko King Quartz

cal. 9923

Factory Spec. 20 SPY

Thermocompensated: Dual Oscillator (32 kHz + unknown)

User Adjustable: Yes

king quartz 

The frequency of the auxiliary crystal oscillator is not 100% certain, although the technical documents seem to suggest that it may be 32 kHz.

Some details for this watch are missing as the watch has not yet been subjected to comprehensive testing.

Parent Company Seiko Holdings Corporation
Brand Seiko
Model Series Twin Quartz
Model Name King Quartz
Model Number unknown
Case Number 5010
Serial Number 981073
Approx. Date of Manufacture August 1979
Calibre (mvt maker) 9923
Calibre (brand) 9923
Factory SPY 20
TC Appproach Count adjustment & twin quartz
Frequency (XO 1) 32 kHz
Frequency (XO 2) unknown (32 kHz, assumed)
Rate Adjustment User
Major Inhibition Period unknown
Minor Inhibition Period unknown
Power Disposable cell
Cell Number SR927SW
Case Back Cell hatch
Water Resistance unknown
Features 3-hand, no numeral dial
  Day, date (not perpetual)
Timing Results Basic data  &  Further details
Images Photos - Large File Sizes!
Documents Parts list and technical guide