: I am no expert but do have an early 2447 Serial 54xxx with Swiss
: only in the lower sub register and no "T", I believe
: this was the norm for the first execution 2447. Mine also has
: the first execution eggshell finish dial and not the later
: silver. It would seem my serial is later than the one you are
: looking at so would have thought the dials should correspond.
: Photo below. If the watch you are talking about is the one on
: ebay in the UK then I have seen some odd Heuers pop up from that
: dealer.
If it is that one, then the bridge of the movement looks wrong as it is signed "Heuer-Leonidas". These first run Carreras should have "Ed. Heuer" signed on the bridge.