Ok, so it's not a radio! You'll just have to bear with me!
I just couldn't get by without throwing in a couple of ancillary "objects d'art", and this is sure a neat one. "A" says: "The 100 is a speaker!" "B" says: "The 100 is a drum!" Stop, you're both, er, never mind...
All kidding aside, this was a very popular "sound reproducer", as they were sometimes called. The 100 was steel, and the gold fabric was protected by sturdy metal mesh. The reverse is the same as the front, and this allowed what dubious audio qualities it possessed to reverberate out the back as well. I think the original selling price was around $35 US.
The speaker can be heard playing through the Radiola 25.