The cable clamps on the ross make me think mid 70s. About 5 years ago, I bought a NOS Ross Super Gran Tour for its early Shimano 600 group. It had a Hi-Ten frame that looked similar but had brazed on cable guides on the top tube.
edit: Looks like I "MissRemembered", Here is a pic of that Ross frame & there aren't any braze ons. Looks like yours might be the same frame. The lugs & seat stay attachment look the same. Don
Last edited by ollo_ollo; 12-23-07 at 08:15 PM.
Reason: correction + more info