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! |