Grateful Dead Avalon Ballroom Poster. This Poster is an early reproduction from 1977 by.RP oo6 Kelley / Mouse Portal Publications. The condition is Good; No discoloring or Foxing The Corners have been Tacked; one small tear alo g the bottom; other wise Poster has been rolled up for many years. Measures : 20" inches x 28" inches. This item is in the category "Entertainment Memorabilia\Music Memorabilia\Rock & Pop\Artists G\Grateful Dead\Posters". The seller is "the*vintage*under-ground" and is located in this country: CA. This item can be shipped to Canada, United States.