Why is it almost impossible to have a good picture of a guitar from the 80s?
Anyway, here are the Casio MIDI guitars MG-510 (the strat clone) and MG-500 (the cool bizarre shaped one).
So no, Casio didn't just issue cheap watches, pocket calculators and toy keyboards for minimalist German electro-punk bands, they also produced some very interesting MIDI guitars - at least they provided the concept and the electronics and had famous guitar manufacturer FujiGen Gakki make the guitar parts.
It seems that these Casios where some of the best MIDI guitars of their time, a. o. since they completely integrated the MIDI system and the controls - no other did... You can get more info here.
And I think that the design of the MG-500 is one of the best of its MIDI 80s kind.