This thread is great.
I have a 52cm highend Olmo frame from the seventies i would be willing to trade for something italian that's more in the 57/58cm-ish area, toptube length seems to be much more important with my body specs...
The frame is in very good condition, comes with headset and BB, no decals, one heck of a beautiful forkcrown, it's this one, with added TT cableguides and in blue, and 52cm ST. Really nice frame IMO, bought it for the wife back then, didn't work out, want to get rid of it.
http://bulgier.net/pics/bike/Catalogs/olmo1/2.jpg