A huge 33″ x 44″ promotional poster issued by Grateful Dead Records in 1975 to promote their albums Blues For Allah, Wake of the Flood and From The Mars Hotel.  This poster is in near mint condition, having been sitting folded in a collection  for nearly 40 years. Other than the original machine folds, this is in virtually perfect condition. The only example of this rare poster we’ve seen.  (If you wished, linen backing this would eliminate most of the creases.)