Hispano was sold in 1946 to INI (Instituto Nacional de Industria).
As Pegaso was part of this company, perhaps you know the car as a Pegaso like the type 66 Hispano truckcs which were sold as Pegaso.
The car is present in the movie " España País de Automoción I", Documentary, 2006.
You can see the Hispano emblem on this picture :