Check out page 9 of Part 1 of the Lemke Files (historical documents on Wagners):
https://www.t206resource.com/Article...gner-File.html
I think this card may have been the one up for auction in the 9/30/1976 SCD issue.
Of the 3 Wagners in the Resource gallery that are trimmed to the bone on three sides, it is the only one that matches the description of creasing across the chest.