Volvo P172 styling mockup from 1966 (I believe)?
That's exactly what it is, yes.
The similarity to the Momo Mirage is indeed remarkable.
The Volvo P172 Coupé has been puzzled before, but this is a slightly different version with a different front (the other has rectangular headlights and a different grille). I don't know if there are any other differences in the bodywork.