There were quite a lot of RCA models with the same knobs.
This one:
http://cgi.ebay.com/VINTAGE-RCA-VICT...mZ310087504889
Really good closeup if it helps another AKer locate one in the junk drawer.
And so does this one (and back panel too):
http://cgi.ebay.com/ws/eBayISAPI.dll...m=330274551403
It's too nice to scavenge but I've seen others that went for parts. If you find a parts set try to get all 4 knobs, as the color variation might be significant between TVs and one of them off-color looks bad.