Dan Colman of Open Culture says, "Watch Peter Pringle perform on the theremin "Over the Rainbow," the song originally written for 1939's The Wizard of Oz.
And it's not just any theremin. It's the 1929 RCA theremin that belonged to the Hollywood thereminist, Dr. Samuel Hoffman. In fact, it's the very same one that Hoffman played on The Tonight Show with Johnny Carson in 1956, below."