Need some historian type help

Hello all.
New to this forum, looks like there's some wonderful Information going on up in here. 
I have an Etherwave Theremin model #02071. It's one of the older Big Briar models. 
It's also signed by Bob. The story behind me getting it, is a wonderful part of my history,
and I'm not interested in selling it. I've not seen another one out there like it. Mostly 
I've seen signed Moog Etherwaves. Really hoping someone can give me more information..
Thanks!!!!!
Paul