via this auction
Anyone know when the Clavitar was released? Here's a pic of George Duke in 1980 with one.
BTW, on the last page of the current September issue of Keyboard magazine (with Devo on the cover) is a one page feature on "Keytars Past and Pressent." I was under the impression that George Mattson's Performance Music Systems Syntar (1980) was the first keytar, before the Moog Liberation (1981). It looks like Roger Powell's Probe may have preceded it in 1977. Anyone know if it was just a controller or if it had a built in synth like the Syntar? Jan Hammer apparently also had a newer Probe, which you can see in this video and this video. Before everything was the Orphica from 1795.

Roger Powell image via audioholics

Update via plaztec in the comments: "The Probe, as invented by Powell (& Jeremy Hill) and refined by Jan Hammer in the area of the pitch & mod wheels (note the left-hand sides of their respective keyboards are quite different, Hammer preferring the Minimoog-style wheels), was a controller and not a self-contained synthesizer. Both had custom rigs; Powell had a bank of Oberheim SEMs, IIRC - and Hammer the same, blending the SEM sound with the Minimoog in order to get his signature lead tone. Jan also experimented with a cruder, squarish remote in order to get the placement and angle of the wheels exactly right for him, prior to the building of his custom Probe. IMHO, those two guys in their heyday were, and remain, the single most credible-looking and compelling rock keyboardists to use remote keyboards on stage, especially considering the musicians they shared the stage with..."
Update via Jimmersound in the comments: "There's also info on the Probe in this Synapse issue."