: Hello.
: Finally I bought the Carrera. Thanks to Mark Moss and everyone who
: has helped me.
: I supose it is a 1553N. Wher must be incised this serial number?

Hi again Juan.

Congratulations and welcome to the Heuer club!

If it's the same watch we were talking about before, it's an 1153 N - the 1553 has a small permanent seconds register at 10 o'clock instead of the 12 hour register at 9 o'clock the 1153 has, and uses the Calibre 15 movement instead of the 11/12 (the first two numbers in these codes denominate which movement is used, although Cal 12s confusingly stuck with the '11xx' codes). Coincidentally, I've just taken off an 1153 N myself to sit down at the keyboard - it's a good choice to start a collection with (did we warn you that this might only be the start of a growing collection?!).

The model reference number is (lightly) engraved between the bottom lugs - if you move the strap so it hangs down, you should see it on the small lip on the case. You might need a good light source and/or a loupe to be able to read it if the case has wear, as the engraving really can be quite faint. Only the numeric code is engraved - the "N" indicates the darker dial version (originally "N" for "noir", but the early dials for 1153 Ns are catalogued as "charcoal grey" rather than black).

The serial number for the watch is in the same place between the top lugs (should be six numbers).

Enjoy the watch!

Mark