hi redmist,
fyi- my designation of guerciotti "professional" for the model of your frameset is based on my recollection of the approx 1980 italian colour folded brochure distributed by ten speed drive showing the full range of guerciotti bicycles. my memory is that the bikes shown were fully equipped completed units. alongside the pictures were the nomenclatures: " super record professional strada"," nuovo record professional strada", "gran sport strada"(falck tubing), "nuovo record pista",etc.. including the cover photo of the "super record oro professional strada "(identical in frame spec to the super record & nuovo record but maxed out with gold plating and obscene amounts of pantographings)a cyclocross model and a child's racer with details of their respective build gruppos. all the columbus sl bikes and frames were essentially the same as yours save small detail revisions such as f derail. braze-on, change in fork crown, etc. that appeared sporadically and incrementally until the major frameset revisions in approx. 1984
I once found the brochure somewhere on the internet but unfortunately have long lost the website address.
ps-you might find this of interest-
see page 136,chapter 15 of the pdf of The Custom Bicycle-
http://icelord.net/bike/thecustombicycle.pdf