Sure 556S vintage microphone, early 50’s, Black i/d label s/n 439. This is the model with selective impedance switch and shock mount.this unit is in good condition, sounds and works as it should. There is a slight scrape mark on upper rear grill. The inner frbric cloth grill has deteriorated and removed showing a clean solid interrior view. I have owned this mic since retiring from the broadcast industry in the 90’s,it haz been in storage since.
I would be interested in trading for a SDR transceiver, G90 or similar.