The thin ribbons on Open Roads would have been 3/8 grosgrain ribbon. The bows aren't actually tied. They're just made to look that way. A couple folds here, a stitch or two there, add a loop, (keeper), and you have an optical deception that looks like a tied bow. Could be that the tubular looking ribbon that you're describing maybe ply ribbon? Although I do have a Bradford Westerner that has a very thin round ribbon. Is that what you were referring to?