Can anybody help me identify this frame? It's an Olmo racer with Columbus Matrix tubing (before they changed the name to Cromor), Prugnat-style lugs, Columbus dropouts, fully chromed fork with Olmo logo, and full braze-ons except for the front derailleur hanger. It has no numbers other than 56 stamped on the bottom bracket, which is the frame size. I figure early- to mid-80's vintage, I bought it in 1991 in new condition. It's a pretty nice frame, classic Italian racing lines, close to but not top-of-the-line. It was originally painted a gunmetal gray color, now it's natural metal awaiting a repaint. What I am wondering is what model this is. I have no idea what Olmo called their different models, and haven't found much on the net. Thanks!