Ace Double (M-121, 45 cents) 1965 paperback. Condition is VG to VG+: tight and square with flat spine, age tanning is mild and uniform (slightly darker on insides of covers.) Delany side has a couple of 1" finger-creases, and 1" fold-trace at upper right. Petaja side has a 3" fold at upper right and light general wear. No stamps marks or writing - a very clean copy.