: Hi Ewan,

: very nice watch, congratulation. I like the gold tone.
: near to the earliest serials of 53xxx

: about the T dial, read what Mark said
: http://www.chronocentric.com/forums/heuer/index.cgi?md=read;id=59169

: the hands: some well known artists can do some work

: movement : here picture from Shaun, same poly back one with
: "ed Heuer", think "Leonidas" is later.
: http://www.onthedash.com/Guide/_Chronographs/63.Carrera/a.Manual_%281960s%29/Carrera_45/c.Reference_3647_T/28Car3647TPairShaun.jpg

: what about description on the case back inner side ? will be
: "Ed Heuer" too...?
: my poly back 2447S is also signed "Ed Heuer", and the
: script appear ok for me.
: cheers
: mich

Thanks for all the responses so far. To answer mich, yes, the case back also says Ed Heuer.
I did wonder about the T Swiss on the dial as I'd read before about it being there/not being there. I suppose it's possible the dial was replaced at some point with a 1st execution dial which had the T marking.

As for the movement; well I'm not sure there either. There's another component (not sure of the name, sorry) to the left of the bridge, which in other Valjoux 72 movements also carries engraving (Seventeen Jewels), which is missing on mine.

I've take a couple of other pics of the movement and case back, to further speculation :)