I agree, especially with the bracelet.

Stewart

: Hello there Sue.
: These have become scarcer recently and as usual value depends a lot
: upon the actual status.
: The 510.501 is one of the Lemania 5100 powered Heuers and one of
: the last 'true' Heuers. It was in catalogues from 1983 to 1986
: and later it was modified (different movement) and became TAG
: Heuer 510.501/12 - one of the few to make the transition. Yours
: is a very nice example of the day-date version, which is the
: rarer in the black PVD - the other being date only.

: It is a very, very sturdy chronograph, perfect for everyday wear. I
: have one and it was my first 'vintage' (well, in the sense of
: pre-TAG) Heuer.

: If the conditions of yours are indeed mint - hard to say from the
: single picture but it looks a bit worn on edges, so more VG than
: mint in my opinion - the value has indeed increased, helped and
: abetted by the general appreciation of Heuers lately.
: Assuming mechanical conditions work spot on, on its original
: bracelet the value is higher than 1000 EUR on a private sale,
: let's say between 1000 and 1500 - depending on the overall
: conditions of the PVD, whether or not box are included etc.

: Hope this helps.
: Cheers,
: Fabrizio