Offered here is a nice felt bag for a Zenith Royal 500 transistor radio produced from 1955 through 1960. This bag has no rips, tears, or odors, and just shows the slightest signs of any use. I use these bags to protect my nicest radios from dust and scratches.
These felt bags were sometimes offered as an option for the buyer and were intended to be used to protect radios from becoming damaged from sunlight or the oil from leather cases. In fact, Zenith would include the following warning:
Why not protect your gem Royal 500 radio the way the company intended?