Zenith marketed an optional protective soft felt bag for their high end Royal 500’s.  It did a nice job of keeping the radio surface scratch free.  Many scratches came from the repeated putting in and out of the leather cases. 

Zenith also issued a warning slip about possible discoloration from storing radios in their leather carrying cases. 

 

I don’t know if this warning was true or if it was issued to try to sell more felt bags, but I’m not taking any chances.  Maybe that is why so many white radios are now an ivory color?  Just to be safe, I protect all of my finest radios in felt bags when they are not on display.    

Below are some of the different styles of felt bags that I have been able to find. 

 

 

Check out these Protective felt bags radios.

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Early felt bag for hand-wired 500's
Hand-wired bag version 2
Common Royal 500 felt bag
Royal 800 felt bag