This Ellena body was first showed in 1962, in a different version (first and second picture) and was put into production from 1963 in a second version.
The puzzle car is the third version, from 1964, with a bigger grille (third and last picture).
The car was offered as Fiat 1500 (chassis from Fiat 1300/1500), Fiat 1600S (with the OSCA engine), Abarth 1600.