Dear Sirs!

I was reading/learning in your wonderful and informative "on the dash" site for about a week, being completely new to vintage heuers, but not to vintage in general. I think its the best place here for the old Heuers. My first post here, english is not my mother tongue and I hope I can manage to provide a drop box link to my amateurish mobile pics photos in the correct way.

Some days ago I found and purchased a first execution Carrera 3647T, cal Valjoux 92, movement signed "Ed Heuer & Co SA" only. Inside back is signed also Ed. Heuer only, meaning pre Leonidas. The Carrera 45 dial has "swiss" only (without "T"), which also looks like dating it to early 1964?
Between the lugs under 6 serial nr. 54352. This is only 25 (in words twentyfive :) pieces near the one in the famous lot22 of Bonhams Haslinger auction of dec 2010. There is also an article at Hodinkee In Dephts "The very first Heuer Carrera" etc., I am sure all of you experts here know this very well. They say, the earliest known serial number for a 3647T is 54510, but they are wrong, because this is also a little later than mine.

Besides the joy this strong running watch in very good condition is bringing to me from the aesthetics, design, proportions, what should I tell you here ;), I would like to know out from a historical interest, if I am right with my short research, this at the moment being the earliest known 3647T?

So here (hopefully) some pics:

thx for your attention