Original 1st printing 10 x 5&1/2" blank-reverse psychedelic three-panel handbill/card by Raphael (Bob) Schnepf.

 Medium-thick flat index stock handbill is in excellent (B+) condition; aside from a touch of edge toning, a few light smudges/pin-prick spots scattered around the outer margin area and a slightly uneven area of soft toning on the reverse side, it is a VERY sharp example of this early (1966!) psychedelic handbill by the future Family Dog artist. 

I have no idea what this was done for, but it's got a REALLY wild design.