This is a 1978-1987 decal for a tretubi Columbus SL or SP frameset. In other words, only the three main tubes are butted SL or SP, with the stays and blades some other material (often, though not always, Aelle). Builders typically transitioned from SL to heavier gauge SP around thge 58-60cm frame size.
The only Columbus decals during this period that did not not have the tubeset designation were SL and SP. Aelle came in a standard, plain gauge version and a butted Aelle R (Rinforzati) version. Cromor was also butted. Columbus' butted tubesets used a single butted seat tube, with the top and down tubes being double butted.