CM Ribbon (Unidentified)

This design is broadly based on the RCA 74B, with a long broad ribbon and large magnets at the rear. It appears to have a high impedance output transformer and an unbalanced amphenol type connector.

We know almost nothing about this microphone or the company that made it, except that it was acquired from an Italian seller in Milan in 2013.

Milan seems to have been a hotbed of creativity for the Italian audio industry in the 1950s, with other brands and models such as DoReMi and VAAM also working in the city. Perhaps the M in CM stands for Milan?