Jason---congrats on the Maris proof. I picked mine up sometime back. I then read an SCD series of 5 articles on proofs by Olbermann in which he speculates that the Maris proof may have been an intentional Topps creation. I think he based that on the relatively large numbers of these proofs that exist as compared to really rare Topps proofs like the 1960 Cimoli/Handley/Throneberry, or the Jackson 1977 as an Oriole and related proofs from that year. I think all 5 parts can be found on line. Here is the one that talks about the Maris
http://www.sportscollectorsdigest.co...roofs-part-twohttp://www.sportscollectorsdigest.co...roofs-part-two
Here is mine. hand cut. I think Topps did one or more sheets of them