In general, the 1960s model Roma and Gran Premio both had Campy rear dropouts.
The Roma has Campy fork ends, while the GP may have Campy, or may have unmarked fork ends.
Roma has a split in the front of the seat cluster, and the binder bolt (usually) pinches this together to hold the seatpost in place. The GP generally lacks this split, and uses a different style bolt which pinches against the post itself.
Roma have real lugs at the headtube. Some GPs have a pressed headtube assembly - easy to tell from the impressions on the inside of the headtube.
The Roma has seamless tubing. Some GP have welded seam tubing.
Hope this helps.
Blue Ball, Ohio
> I think that the presence of Campagnolo dropouts indicates it to be a Tipo Roma Olympiade. Others more knowledgeable on Legnanos will likely chime in on this one, though.
> Greg "had a blue one" Parker
> Dexter, Michigan
> Date: Sun, 3 Oct 2004 15:46:16 -0700
> From: "Carmella St. Martin" <firstname.lastname@example.org>
> To: <email@example.com>
> Subject: [CR]Legnano Model Differences
> Hello Listmembers,
> How can I tell the difference between Legnano models Roma Olympiade =
> [Tipo Roma?] and Gran Premio. I just recently acquired a frame which I =
> believe to be a '61. Serial # is EX6728. There are no discerning =
> markings on the frame which would indicate the model. It does have the =
> Campagnolo adjustable dropouts. Thanks for any information.
> Marc St. Martin
> Livermore, CA