Did Shure make OEM microphones for Stromberg Carlson?
Yes. There was an OEM version of the Unidyne II Model 55S. The MC-41 was likely manufactured between 1951 to 1961. The predecessor of the MC-41 was the model MC-31; it was based on the Unidyne Model 55, with the larger housing. MC = Moving Coil
There was also the model MD-57, based on the Shure model 535.