Original 1st printing (OP-1, glossy stock) 14&1/4 x 20" concert poster for Country Joe & the Fish appearing along with the Sparrow (proto-Steppenwolf) and Kaleidoscope (featuring David Lindley) at the Avalon Ballroom in San Francisco, CA from 2/3-4/1967. 

 Art by Victor Moscoso, image ("Dance of the Five Moons") is # 46 in the Family Dog/Avalon series. 

 Medium-thin glossy stock poster is in near mint (A-) condition; really nothing more than a couple of fairly negligible edge/corner-tip dings and a soft pinch bend or two hiding within the image area, otherwise it is an absolutely STUNNING 1st printing example of this early 1967 Avalon poster. 

 The glossy-stock 1sts are becoming VERY hard to find in nice shape.