SINGLE COMICS DC C Challengers of the Unknown Series 1 #66 PreviousChallengers of the Unknown Series 1 #65 NextChallengers of the Unknown Series 1 #86 Pence Copy Challengers of the Unknown Series 1 #66 Challengers of the Unknown Series 1 #66 £3.00 DC Mar 1969. 1st Print. Friedrich, Sparling. GD+/VG- 3.0 tanning/staining, well held together. Cover: Joe Kubert. 36 pages complete Add To Cart Facebook0 Twitter