on some models of the Heuer chronographs, we are able to establish a fairly accurate sequence of changes (for example, when the hands, dial, case and / or movement were changed to a later version). Still, in many instances, Heuer seems to have used a variety of parts in the same exection of a model or version.

On this GMT, I had imagined that we would conclude that the larger registers were "earlier" (following the pattern of the 2446 and 3646, in which Heuer started with the larger registers and them made them smaller in later executions). But to get exact alignment of all the "early" elements (hands, pushers and dials) seemed unlikely.

I suppose we have concluded that there was little precision in these executions, and that what remained in the parts bins was what went into the chronographs. And if another stash of earlier parts was found at some later date, I imagine that they went into the parts bin as well . . . and so it goes.

thanks for an interesting discussion (and some fantastic photos)!!

Jeff

++++++++++++++++++++++++++++++++++++++++++++++++++

: All theories are out the window. Whatever it
: is/has, it is! Thanks for the picture. Why
: did you ever let that beauty go?
: Cheers,
: David