I'm going to guess a lower end model. I believe Tullio tubing is hi-tensile steel. Better mid-range models would have used at least Columbus Aelle or maybe Gara Tretubi (3 main tubes) depending on the model year. The pics aren't high enough resolution to make out a lot of detail here's what I think I can see: no chrome - chrome fork at least was common on better models in the 80's, stamped dropouts - better models would have had forged dropouts with adjuster screws, cheaper spokes - they look dull gray rather than stainless or chrome plated, possibly shrader valves on the tubes (hard to tell at this resolution) which might indicate 27" rims. Are you sure they are tubular? What size are they? It appears to be in nice shape but I doubt it's a high-end or even mid-range model.