The subject bicycle appears to be a 1986 Bianchi Strada. This was the bottom of the line model, with a hi-tensile steel frame. The original rear derailleur was a Shimano Z501 with Shimano Z408 stem shifters. The OEM wheels were Suzue (front QR, rear nutted) laced to Araya 27" aluminum rims. The rest of the bicycle appears to be OEM.