RA Moog 351 Theremin

via this auction

BIN of $18,500.00

"Here is an extremely rare vacuum tube theremin made by a young Bob Moog and his father in Flushing, New York back in 1954. Everything is original and nothing has been modified or altered in any way. It works great! You can check out a little more information at this link-- http://moogarchives.com."

via cynep on the forum.