Hi I recently acquired a 1952 Johhny Lujack PSA 4 with a shadowed image of Lujack on the back. I havent been able to find any similiar cards and was wondering if anyone knew anything about these shadow backs. it is a clean image of the front of card just transposed on back. not bled through, not smudged at all so doesnt look like it was stuck to another card. any info appreciated