Posted By:
Dave HornishOK, I do not own any of these but I know of 2 or 3 board members that do. I can't help but think they are related to the Sports Illustrated inserts from '54 and '55. Topps may have been experimenting with a stamp issue (not necessarily baseball) to test the medium and may have just used a partial section of an existing sheet to make up the stamp proofs. I cannot find too many Topps stamp issues from the 50's (perhaps the X Ray Roundup Stamps are a Topps issue but that is not a conclusive fact) so these are even more of a mystery.
If enough people have these and can post which sides of their stamp(s)are perforated, then maybe the full sheet can be reconstructed. The '07 Standard Catalog had 23 known examples and it's possible 24 is the full run. Post 'em if you got 'em!