… mark a mistake of yours: you obviously confused the number of a caliber with the movement number! The number of a caliber is nothing but the name of a caliber, used to distinguish different calibers - whereas the movement number is the production number of the very movement it is engraved on. Both must not be mixed up!
The discussion itself was and still is about why some 24000-42s have CHRONOMETRE printed on their dials and others do not. Nicolas came up with a theory of what could be the reason, which looked good prima facie. But after an argumentative discourse – that is what this forum is for, isn’t it - it is now prevailing opinion that the theory is flawed.
The riddle of the different dials itself thereby still remains unsolved. So you are welcome to contribute to the unravelling of that mystery by an array of reasons. Or – as Locke would have put it:
"Reason is the candle of the Lord in men’s minds – the light by which we judge.”
Christian