Tim,
Probably! It's all very confusing :0)

7750 Movement series model no's and description.

1) 750.501 Concave lip barrel case, Black PVD, Pasadena. (Earlier models had Pasadena on the dial) (In OTD catalogues 1979, 1981 Speciality, 1982 Speciality)
2) 750.503N Concave lip barrel case, circular brush effect S-Steel, Montreal. (Earlier models had Montreal on the dial) (In OTD catalogues 1982 Speciality)
3) 750.503N (yes, same as above but different case) Convex barrel case, Starburst S-Steel. Montreal. NO NAME ON DIAL IN ANY CATALOGUE, always day/date (OTD catalogue 1977, 1978, 1981 Speciality)
4) 750.501-3 Concave lip barrel case, circular brush effect S-Steel, no name on dial, date. Not seen in any Catalogues on OTD. This is a strange model, as it clearly has the model numbers of a Black Pasadena, but is Stainless Steel, so Heuer added '-3' to denote a stainless steel Pasadena. Because of this confusion, it is sometimes referred to as a Montreal.
5) 750.503B Blue Dialled Montreal. Concave lip barrel case, circular brush effect S-Steel.

Hope that helps.
Stewart

: Hello, ok Stewart thanks i have 2 Pasadena's for sale 1 PVD with
: box and paper's and one SS . is that correct ?
: Ta
: let me know