Hi, back to Masis!!
I have a 1980 GC, which seems to have a very short frame. It's an M53 and measures 53 cm from BB center to the to of the seat tube lug. Seat tube is 51 cm c-c and the TT is about 51.5 cm c-c, very short, and the wheelbase is 95 cm.
On ebay there is an M52 GC frame (claimed S/N 5002) that is newer than mine, auction 160080283389. Frame looks nice but is damaged by drilling, a sign of impaired owner judgement IMO (it's up to $102.50 as I type with reserve not met, for what it's worth?). BUT, the seat tube length is claimed as 52 cm c-c and the top tube length is 54 cm c-c. There's a discrepancey between the M52 designator and the 52 cm c-c measurement, but the TT is what's interesting.
I also recall a past Italian 3V on Ebay, with claimed seat tube length of 52 cm c-c and TT of 55 cm c-c.
My question is, is the geometry of the current Ebay frame typical of small Gran Criteriums? Does anyone have a good set of numbers for a non-custom M52 or M53 Gran Criterium? I haven't found anything comprehensive posted on the List or anywhere, but that could just be my low Google skills.
Inquiring Masiphiles (at least this one) want to know!
Ken Freeman
Ann Arbor, MI USA