Citizen Crystron 4 Mega
cal. 7370
Factory Spec. 5 SPY
Thermoinsensitive: High Frequency (4 MHz)
User Adjustable: Yes
Citizen were the first to market with a 4 MHz watch, and the Crystron 4 Mega is a bit of a 'grail' watch for some collectors. Only recently arrived, a local watchmaker was very helpful in fitting the battery hatch with a new rubber ring and putting in a new battery. It seems to tick along ok, although not all of the markers are hit precisely.
| Parent Company | Citizen Watch Co. |
| Brand | Citizen |
| Model Series | unknown |
| Model Name | 4 Mega |
| Model Number | unknown |
| Case Number | unknown |
| Serial Number | 902669 |
| Approx. Date of Manufacture | February 1979 |
| Calibre (mvt maker) | 7370 |
| Calibre (brand) | 7370 |
| Factory SPY | 5 |
| TC Appproach | Thermoinsentive: HF |
| Frequency (XO 1) | 4.19 MHz |
| Frequency (XO 2) | n/a |
| Rate Adjustment | User |
| Major Inhibition Period | unknown |
| Minor Inhibition Period | unknown |
| Power | Disposable cell |
| Cell Number | unknown |
| 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 | User manual |