Vintage RCA 77-DX Microphone

Here is an RCA Type 77-DX multidirectional ribbon microphone.  This microphone was my father’s for many years.  I’ve recently tested the mic; it works great and still has a very good sound.  There is a small indent in the upper windscreen, but seems very repairable, and slight metal oxidation on the U shaped mic holder.   Please send an email if you have any further questions.  Thanks.