Seiko King Quartz
cal. 9923
Factory Spec. 20 SPY
Thermocompensated: Dual Oscillator (32 kHz + unknown)
User Adjustable: Yes
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 |