I believe this is the set:
http://www.vintagetvsets.com/west196.htm
and
http://www.earlytelevision.org/westinghouse_h-196.html
I've seen those brass outer knobs a few times on eBay and swap meets, but don't have any spares for ya right now
I might have some of the inner brown ones though. If you can provide a nice closeup picture, I'll check my stash.
P.S. That's a real nice set
