I received more information about the origins of this card. The seller I purchased the card from had acquired someone’s collection, and that person said his grandfather was the original owner. The CH on the stamp matches his grandfather’s initials, so his assumption is his grandfather stamped these cards for some reason.
I’m not sure if National Chicle had an anchor logo as ChatGPT indicated, but most likely this was a kid’s stamp. Thanks for your response!
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