First, check the top of the rear derailleur for a date code. (Mine reads "PAT 80.")
My Bianchi's (see signature) serial number is stamped around the seat lug. I have a "B" on each side of the fork crown, and another at the top of each seat stay. Mine came with silver (not black) Ofmega Speedy brakes and Ofmega cranks and bottom bracket, but a Campagnolo seat post. My stem, made by TTT, is stamped "Bianchi" on each side. My head "badge" is a decal.
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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