snipped from Doug Fattic's post:
"their are a number of amateur builders who have made a frame for themselves and a few for their buddies. This framelooks like a candidate for that class of builder. There are a couple of clues for this. First, he didn't bend the back of the front derailleur cable guide on the top of the bottom bracket shell to match the angle the cable runs. A pro builder wouldn't make that mistake. "
Doug, this may be more of a topic for framebuilders forum, but your comment prompted me to take a peek at my bikes with that b.b. cable guide. My Italian bikes, the Olmo and Medici (well, sorta Italian) have this same cable guide, and they have the same angle as the Roth frame cable guide. Or lack of, as you say. My Japanese bikes, specifically my two Centurion Pro Tours, have a very nice upward curved radius at the rear of the guide, sending the front der. cable on it's way.
Thanks for pointing out this subtle difference! This knowledge will come in handy in the future.
Jay Sexton
Sebastopol, CA