Superman #233 CGC 6.0 Iconic Neal Adams Cover. Up for sale is Superman #233, graded by CGC at 6.0! This comic features the iconic Neal Adams cover, a must-have for any serious Superman collector. The comic is in good condition for its age, with a secure and well-preserved slab. It would be a fantastic addition to your collection! Don’t miss out on the chance to own a piece of comic book history.