rare vintage Olson Radio transistorized microphone mixer, nice mike pro

Description

This is a great old Olson microphone mixer,  it was just found in an estate with some vintage microphones I'm also listing.  I have no way to try it, so I'm selling as is, but everything in this estate we have tried has worked great. I'm listing some other cool and unusual items from the same estate tonight, so check out my other auctions, I can combine shipping to save money. Please check my 100% positive feedback before you bid, thanks