: The registers should be slightly recessed as on this example - the
: dial is built up as a "sandwich" of layers and the
: registers are one layer below the top of the dial.

: There are plenty of people offering replacement straps and for a
: buckle you could go vintage (expensive and beware of forgeries)
: or for one of the re-edition buckles (still keep an eye out for
: fakes).

: The price is reasonable, certainly for Switzerland - when I've
: been, I've noticed that it's not really the cheapest place to
: buy vintage Swiss watches, ironically!

Yes that's right, registers are "only" slightly recessed, that's why my question as I saw pics on the net of watches of the same model with concav registers and also with other tachymeter scale number as on picure below. But for both watches it says that's a Heuer Carrera 45 ref. 3647NT. Are there different types of the same model?

Ok, thanks for this input on straps/buckles.

And you're right, Switerland is not the cheapest place for any goods. Thanks a lot for your advice.