In 1915 Cracker Jack issued an album that you could send away for using 50 coupons or 1 coupon + 10 cents. The album allowed you to tuck each card into spacers at the top so that you could then flip the card to read the back. Having the text upside down allowed you to read the text right side up once you flipped the card. (read 2nd paragraph on card back)
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