The car is for sure a Regata (I mean, a Fiat type 138A), Weekend, frist generation. From the rear view, the only odd detail are the rear headrest (never fsctory fitted), but I'm not sure it's really a clue.
It was made in 3 factories only, as far as I know:
- The Fiat Regata in Turin, Italy.
- The Nasr Regata in Cairo, Egypt (but I believe only the sedan)
- The Sevel Regatta in Buenos Aires, Argentina.
Several special series have been made out of them. I see the trace of a sticker on the side so I could guess a German Regata Rivera (also the wheels match, but the roof-rack is missing). Am I on the right track?