@signed8bit nice shots!
The principal derivative of the Fiat Nuevo 500 was the Autobianchi. A chic, upmarket product conceived in parallel with the Fiat 500, the Autobianchi firm was part-owned (and later fully-owned) by Pirelli and Fiat. In 1960, Fiat introduced the Giardiniera estate version of the 500. The engine was modified and laid flat to maximize the luggage space. Compare this red wagon to the green wagon next to it. You will see the front doors are hinged at the front, rather than at the rear. The nose is a little longer, the headlights are higher, and the bumper is more substantial. Overall, it is a longer vehicle. Notice the back end sports “fins.”