Pre-War cards has a write up that suggests 1) the artist goofed, 2) Burns was goofing around, or 3) he was ambidextrous (fact) and was wearing a six- finger glove (they existed) which lost one finger to cropping. The uncropped version of the same image showing him wearing a six- finger glove is on Burns' T3 card, which I don't have.
https://prewarcards.com/2018/04/03/a...06-error-card/
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