DuraAce EX gruppo (probably original to this bike) would date it to between 1978 and 1984, but since this frame has portacatena dropouts, I'd guess not earlier than 1980. That and late '70s Benottos still had cable clips and this has more "bikini" lugs plus that "fade" paint would have come along a little later. Might be made in Italy, but pretty sure the majority of production was in Mexico by the '80s.