Ace Double (F-199, 40 cents) 1963 paperback. Condition is VG+ or better: very tight and square with flat spine; very light overall wear including a 1" finger-crease or 2 on each side; age tannning is mild and uniform. There is a very slight binding-fault which kicks a 1/8" segment of pages about 1/16" away from spine - showing as a slight ridge at page edges. No stamps, marks or writing - a clean copy that looks unread.