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 has joined my collection not so very long after the first Superior that I acquired. What makes this watch different, however, is that it appears to be in more original condition: the case sides are brushed, not polished, and the bracelet is original.

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.

UPDATE - I sold this watch as part of an exercise in trimming-down the collection and releasing some funds. It is, however, one of the few models which I would actually quite like to re-purchase at some point in the future.

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 862196
Approx. Date of Manufacture June 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!