New in box RCA Type BK-5B

This must be a once-in-a-lifetime experience. Here are the eBay seller’s words: You are bidding on a new RCA Type BK-5B (MI-11010-A) Uniaxial Broadcast Microphone. It is brand new and has never been out of the box until I opened it to take these photos. I had the shock of my life when I opened the sealed outer box. I had no idea what was in this box and could not believe my eyes when I saw this brand new microphone. It had been sitting on the back shelf of an electronics store since it was received from the factory. It has probably been sitting on the shelf for about 50 years collecting dust. It would be virtually impossible to find another of these microphones in such perfect condition. This is not a refurbished or repaired item. It is in its original box with attached cable and stand fitting. Also included is the original owners manual and data sheet, even the warranty card (try using that) is in the box.