Which Bianchi do I have?
 

New post with pics: this is my new-to-me Bianchi lugged steel frame, age uncertain, maybe 7-8 years. It has a full Dura Ace kit except American Classic front hub, Mavic Open ceramic front rim, Fir rear. Chromed steel fork. Markings include Made in Italy on the seat tube, Campione del Mondo on the down tube, Coumbus Foderi Unicrown EL rinforzati on the fork, Bianchi stamped on the BB shell, Fresh Frame grade AA finish Ephrata PA on the left chainstay. Serial #A521p.

Does anyone know what year and model this bike is? It's in very good condition, very comfortable and surprisingly light at 20 lb., smooth as butter on the road. Any guess what its worth? Thanks.

It looks similar to my 10 year old, columbus TSX model, however, for better or worse, I have an ovalized downtube. Mine was available as frame only and went by the name "TSX Ultralight."

So I talked with Bianchi USA. They were nice enough to look at the pictures and conclude that this is a 1992ish bike, likely bought as a frame only based on the lack of decals, then built up custom with the Dura Ace kit. Does that make sense to any Bianchi afficionados out there?