I am need of a Yaesu 8 pin round plug type microphone. The following models are suitable:
MD-1B8, MH-1B8, YM-35 or YM-38.
In addition to the usual press to talk button, these have additional buttons for up and down scanning.
The model numbers are normally printed on the back or base.
These microphones were used on various transmitter receivers in the 1980's.