Grateful Dead Concert Poster 1967 HALO Benefit Winterland Grateful Dead Concert Poster Grateful Dead Jefferson Airplane Quicksilver Messenger Service Big Brother & The Holding Co. The condition is good: There are some pinholes in the corners and a few in the body, there is a dirt mark on the sleeve in photo, some slight ripple in paper on left side and darkening on the white border from age. You will not see much of this when framed. Please see photo for details. This poster and all of the 1960’s era posters and postcards we sell come from The Velvet Underground/Sanford’s Clothing Stores on Broadway in San Francisco. We are the original owners of all the 1960’s posters and postcards we sell.