Picking up n some comments on a current thread https://omegaforums.net/threads/gold-polerouter-date-chronometre.64529/ do we know how many UG models were produced in a Chronometre version? How did these differ(if at all) mechanically from the standard models? There was Railrouter Chronometre.
Presumably no one outside of the company knows the production numbers, as Swiss watch manufacturers were typically tight-lipped about such numbers. As far as distinctions from standard models, it would depend partly on the specific movement being discussed. The most obvious difference would be that the chronometres were adjusted. They may also have also featured some better finished parts. @Bill Sohne would likely be able to shed some further light on the topic.
Oops, sloppy phraseology. I didn't mean numbers produced i.e. quantities but how many different models..