Here's a Shure SM56 Unidyne III Dynamic Microphone from the 1970’s! Shure’s USA made Unidyne III series were some of the highest quality dynamic microphones Shure made. The SM56 was the top of the line version of the SM57 with a bigger transformer with two low impedance options, and a shock-mounted base. If you like the small diaphragm dynamic sound from Shure, this is one of the best you can buy. This SM56 has been serviced and is working perfectly with some light chips to the paint. Grab this SM56 Unidyne III Dynamic Microphone from Shure!