It's Legnano Gran Premio, which was their lower end model.

They came with Campy drop-outs in the rear only, the fork had plain stamped drops.

I'm the seller on ebay with the bolts. Those will not work on this model. The Gran Premio takes a two-piece wedge type bolt that is very hard to find. If you PM me I can send you a photo of what they look like.

It is possible to make something that will work.