Originally Posted by
Picchio Special
In this case, we don't even know if it was made with "SL," since that's the "catch-all" Columbus decal for the 70's - could just as well be the equivalent of SP.
??? SL and SP were identical quality, identical alloy, the only difference being wall thickness. SP was .1mm thicker and intended for larger frames. And
AFAIK, all Columbus tubing of that era (early 70's) was CrMo. Aelle, Zeta, and all the other lesser alloys came along later.
SP
Bend, OR