My uncle was a vendor at the show and came home with some unused (never displayed) posters from the show. Poster in excellent condition having been stored away for 40+ years in a cool, dry environment. There are no holes, rips, marks or stains.
It's not "mint" (by some people's standards) but the best you are going to find at this price. There is NO question of it's authenticity and being an original print from 1973. I stand behind that 100%. Please view photos above for more details. This item comes from a smoke-free environment.
The item "Genuine Original 1973 Summer Jam Concert Poster (16 x 22.5) Gratefuld Dead EX" is in sale since Monday, January 30, 2017. This item is in the category "Entertainment Memorabilia\Music Memorabilia\Rock & Pop\Artists G\Grateful Dead\Posters". The seller is "trader_shag" and is located in Brockport, New York. This item can be shipped worldwide.