Not quite a Spy set but never the less, interesting little transmitter. RNVR transmitter for B28/CR100 rx, fits inside lid, draws power from the rx. 6V6 pa, xtal controlled. Working, comes with tubes, not xtals pictured though. £50 plus post etc. picture: www.qsl.net/g4bxd/b28tx.jpg cheers, Ben.