Hi T-Mar, would this have been a 74mm bb and these with the older style headset seem to be pretty rare as many didn't survive this long. I realize this one is low end but still think it's a pretty good example seldom seen nowadays.
Originally Posted by
T-Mar
The subject bicycle would appear to be a 1972 Bianchi Rekord 71, manufactured in Italy. The tubeset is a lightweight hi-tensile steel. Basically, it was the entry level, racing model. To add to juvela's component notes, the calipers are Universal Model 51, the rear wheel is a relatively modern MAVIC replacement for the OEM tubulars and the seat post/saddle pairing is another relatively modern addition.