Double butted Columbus tubing frame, full Dura Ace groupo -- what's not to like?
I am not surprised it's a great rider -- it is evidently one of Benotto's mid-to-high-end offerings. Others can probably help figure out the year (I don't know Shimano date codes, etc.), but the 6-speed freewheel, low flange hubs, and lack of water bottle bosses suggests circa 1980 to me.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069