Original 1st printing 16&1/4 x 21" 1968 promotional poster for Acoustic Amplification, as used by Bob Weir of (the) Grateful Dead.

 Photographer unknown/not credited (photo is from the 8/2-3/1968 Newport Pop Festival), extra-thin flat index stock poster is in very good to excellent (B/B+ to B+) condition; there is a tiny 1/8" nip out of the lower right corner tip, along with a bit of light creasing/wear along the left/right margins, a few soft handling dings and a couple of ULTRA-tiny edge tears, otherwise fine.

 Very interesting late-'60's Dead-related promo poster, this image was part of a series released by Acoustic and presumably displayed in music shops where the product was being sold (others in the series are for the Doors, Buffalo Springfield, Chambers Brothers, Chuck Berry and more).