Just when I thought I had Bianchi serial numbers figured out, you throw me a curve.
My 1962: 2F51703
My 1981: 1.M9914
My theory: lead digit = last digit of year; letter = either production month (no "I," making mine December 1981) or production fortnight. Yours could well be a 1983, but I cannot guarantee it. Are there any date codes on your Campag. cranks, hubs, or derailleurs? My rear derailleur says "Pat 80."
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"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