I finally nabbed the third and final Herschel card in the 2019 Score Buybacks series. I first discovered these cards in June of 2019. To mark the 30th anniversary of the original issue in 1989, Score bought up some of the original set on the secondary market and reissued them, with the stamp on the card front.
Walker has three cards in the set. #'s 317, 331S and #34, which is this one. It took me a year and three months to locate the final card.