Chuck and all,
Upon occassion Mario would run next door from Masi to the machine shop and mill out some dropouts for special projects. I suspect this bike was made for someone in particular; probably a friend, employee, or someone related to the Masi managment.
La Mesa, CA
'74 Masi Gran Criterium (serial # MC 55 / M4): http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3677070874
Anyone ever seen dropouts drilled and milled on a Masi like the ones on this bike??? http://i19.ebayimg.com/02/i/01/cd/7e/0e_3.JPG
They are milled similar to the ones on my Confente, but with two additional holes.
Chuck Schmidt South Pasadena, Southern California