Citizen Exceed

cal. 1730

Factory Spec. unknown

Thermoinsensitive: High Frequency (4 MHz)

User Adjustable: Yes


Not the infamous 'Crystron 4 Mega', but the much less well known 4 MHz Citizen Exceed. So little known, in fact, that I cannot find any documentation on it or any reference to its factory spec.. This watch was faulty when it arrived (I was fully aware of that fact before I acquired it) and I was very fortunate to find a watchmaker with vintage quartz expertise. He did an amazing job servicing this watch, but told me ultimately that its rate could not be further improved via the main trimmer. This appears to leave the watch stuck firmly in non-HAQ SPY territory. The rate appears to be set via a combination of two trimmers and a form of pattern-cutting. I am currently experimenting with the second trimmer to see if I can improve the rate.

Parent Company Citizen Watch Co.
Brand Citizen
Model Series Exceed
Model Name unknown
Model Number unknown
Case Number unknown
Serial Number 108079
Approx. Date of Manufacture unknown
Calibre (mvt maker) 1730
Calibre (brand) 1730
Factory SPY unknown
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 916SW
Case Back Press (no tool required)
Water Resistance unknown
Features 3-hand, no numeral dial
Timing Results Basic data  &  Further details
Images Photos - Large File Sizes!