<<In this case I translate it to mean "Light Tubes" in .9mm! Probably about
as good
as "Hi Ten">>
It could also mean .9 straight gauge. SL is .9 x .6 butted. 531 was offered
in butted and straight gauge, but (pun intended) is better than Hi Ten.
Without their saying, it is hard to tell. On the Gimondi theme, Matteo in
Italy (beesone on ebay) sold a guy a Colnago built track frame, with Chiorda
decals, that was Gimondi's personal bike. One of two, the other one is still
in Italy and not for sale. The color was a medium blue.
Stevan Thomas
Alameda, CA