[CR] How old is my Rossin Pogliaghi

Hi

I was lucky enough to buy a Pogliaghi, that had been sitting in a garage for years..

Really not sure what year it is, looked over the frame an cannot find a s erial number anywhere

It has Shimano 105 components, and a unusual (& colorful tri- paint schem e)

It does have a sticker on it which say made by Rossin

I would welcome any information on this classic bike

Thanks