My apologies, when I was asking about the Specialissima, "Team Issue" differences, I was referring to the 60's era bikes. I've always believed that SL tubing was used on frames up to about 58 or 59 CM and that SP was normally used on the larger ones.
I don't ever recall seeing a Columbus sticker that denoted one or the other, needless to say I have not seen every Columbus decal. Short of stripping the paint how would you know.
I believe the answers are lost in the two or three changes of ownership and marketing teams.
Jim "I've always loved Celeste" McCoin Fremont Ca.