Steve, I've never seen a Masi with that seat stay treatment. The fishmouth headlugs and stiffner tangs in the fork do look very close to my Model B Cinelli (c.1960?) , but I thought the model B always had eyelets? The dropouts regardless of origin look massaged more than I have seen on any bike of this period, not to say they were'nt filed or milled SOMEtime more recently...it IS 40+ years old after all whatever it is! My Mod B has the hole in the rear hanger for Sport derailleur like your mistry bike, but no oiler cap or drain in the BB. Got a shot of the underside of the rear brake bridge? If its a Mod. B from late 50's early 60's it should have at least a hole or also likely a threaded boss built into the brake bridge underside for fender mounting. Ask your friend what number is stamped into the fork tube.
Dale Phelps Longmont CO
Dale B. Phelps, 303 939 6967
"Never be afraid to try something new. The Ark was designed by amateurs. The Titanic was designed by professionals." - R. Buckminister Fuller
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