I have a vintage Italian road bike from the late 50's, early 60's, an Ideor Asso Special. The bike came with a Columbus frame, Campy 1010 drop-outs, Campy Gran Sport derailleurs, Campy braze-on shifters, Campy large flange quick release hubs, Fiamme Red Label rims with tubular tires, Ideale saddle, Mafac brakes, Ambrosio bars and stem, and Sheffield (made in Italy, despite the name) pedals. The original crankset was a cottered Magistrioni. I'd like to find a period correct cotterless crankset for this bike. Does anyone know what a correct vintage crankset would be (Campagnolo or other Italian brand)? Thanks for the information.