Seiko Superior

cal. 9983

Factory Spec. 5 SPY

Thermocompensated: Dual Oscillator (32 kHz + unknown)

User Adjustable: Yes


Dating from the very first year in which Seiko produced these ground-breaking thermocompensated watches, this Superior was also one of the tightest-spec'd Seikos ever produced. This particular watch turns out not to be in original condition, as I had assumed. The bracelet is not a Seiko product and the case has had some minor refinishing (the sides are polished, whereas they should be brushed). Now that I have a second, more completely original Superior, this one is up for sale.

The frequency of the auxiliary oscillator is not known for sure, but based on a comparison of power requirements between the various Twin Quartz watches in my collection, I believe it is reasonable to assume that the frequency is 40 kHz.

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

Parent Company Seiko Holdings Corporation
Brand Seiko
Model Series Twin Quartz
Model Name Superior
Model Number unknown
Case Number 8000
Serial Number 841543
Approx. Date of Manufacture April 1978
Calibre (mvt maker) 9983
Calibre (brand) 9983
Factory SPY 5
TC Appproach Count adjustment & twin quartz
Frequency (XO 1) 32 kHz
Frequency (XO 2) unknown (40 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!