I just picked one of these up today with 6-speed Shimano 600 components and Modolo brakes. Might this suggest 1984?
Another question: I'm going to replace the Shimano with Campagnolo componentry, but I'm a bit puzzled by the bottom bracket. As best I can tell it measures to 68 mm, suggesting that it is English, but my 1985 Bianchi Campione D'Italia has an Italian bottom bracket, and I assumed that in the 1980s Bianchi used Italian BBs. Not that I know enough to assume so much, of course! Is it possible or likely that the Magny requires an English bottom bracket?