Good example with original and beautiful plates of late "600" (1965-1969), still successful in 1966 (and even later): 64.638 were sold in Italy that year (70.099 the year before), a good result for an utility-car that came out at the middle of the past decade. A reason is surely that this generation, compared to the previous examples, had been strongly improved.
Congratulations for this fine "dynamic" photo