Early 60's Silvertone roundie...
 

Here's a Silvertone roundie that works on ebay in Jersey. Seller says it is a 19", but must be a 21. Looks like an RCA clone.

Here's the link...

http://cgi.aol.ebay.com/ws/eBayISAPI...&category=3320

Charlie,

That's RCA allright. It is a re-badged metal CTC-10. The trim and mask around the CRT are different colors is all and the little C-O-L-O-R symbol that was in a diffractrion grating below the CRT on the mask in the RCA model is absent. Yes it is a 21" set with 21FBP22 behind flat safety window. The CRT removes out the front.

I have the RCA version of this set with the remote control receiver chassis. The metal cabinet is considerably heavier on this model than the CTC16 RCA's in the tabletop metal cabinet.

Rob