Here is a rare 1983 Topps Darrell Evans blankback proof issue.  Found originally on a proofing sheet, Topps editors likely used it to for final approval of its regular card issue.

A rather unique team collectible for your Giants, master set, or proof card collection.

Please ask if you have any questions, and are looking for any other Topps test issues, proofs, or oddball player or team cards.  Thanks!