Originally Posted by repechage
Test, don't guess, since the BB is out, feel for the ridges in the seat and or down tube. Don't trust the painter to label it right. Do remember that SLX was the answer to the problem of tube wall flexing at the braze on mount. The first bikes I worked on used SL and or SP, the SL tubed bikes with the stamped braze on derailluer mount were terrible, the flex was extremely visible upon shifting.
I apologize as I should have answered Kurt's comment about SL vs SLX more definitively. I know it was SL. I no longer have the frame, but there was no rifling. It had a Cinelli BB shell if that is any help.
Originally Posted by joe v
Lynn, that 'JET' sticker or decal looks like some previous owner slapped it on in true DIY-spirit, nothing like any known Guerc-fonts, IYAM.
I thought that might be the case also, but other Guerciotti Jet frames have popped up on ebay from time to time and Sheldon has a reference on his
Seatpost Data page. Sheldon's site gives a 1982 date. I tried contacting those selling their Jets and got no new information. When I originally queried about the frame on CR a couple of years ago, I don't think I got one reply. The CR archives make reference to an article in Bicycling July 1982 comparing it and several other Italian bikes with Japanese steel.