Welcome to the forum Pedro.

: First off, let me say that's a very nice watch you've got there -
: we'd love to see some pictures if you have them (because we like
: to see pictures of Heuers and for another reason I'll get to
: later). I've just come into possession of a 73453 S myself,
: which is the same watch as yours but with a date window.

: And then onto value.

: This depends on a number of factors - the automatic versions of
: these Carreras attract a premium over the manuals, and the
: manuals with a date (73453) or 3 registers (73653/5) a smaller
: premium over the 73353. Though in the example of the
: 73655, that premium is probably equalled out by the fact
: its case is gold-plated and this is often considered less
: desirable than steel for tool watches.

: One of the biggest factors, though, is originality and this is
: where those photographs come in. TAG-Heuer aren't able to source
: every original part nowadays and use replacement hands etc on
: occasion. For real collectors, this may be more of an issue than
: for the person who decides a vintage Carrera is just what they
: need - the collector may well want to source original hands on
: the market and expect this cost to be reflected in the asking
: price.

: And I'm not sure whether you're looking to sell, just interested in
: value or after an amount to insure the watch for... so I'll just
: give an idea of what I expect the purchase price would be, after
: all that preamble!

: On the open market, e.g. on eBay or other public sales channel, I'd
: expect a 73353 to start around the 800 Euro mark (~ $1125) and
: maybe reach 1200 Euros (~ $1700) on a good day, though it would
: have to be in great condition and the vendor a bit lucky. For
: dealer prices, you're probably looking at anything up to double
: that lower amount. Where watches are coming in under that 800
: Euros, I'd expect the watch to require some work - significantly
: under and I'd start thinking of it more as a
: "project", but I think a lot of collectors factor in
: the cost of a possible service anyway.

: Hope that gives you a good idea, but happy to try and narrow it
: down a bit if you can send in photos etc. All of that is just my
: feel for the value, others on the forum may disagree and it may
: vary considerably by location, but I try and stay on top of the
: Carrera values as much as I can!