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1924  Series of 1919 1¢ Proprietary in 1924 usage on a Luden's Cough Drop box. Considered medicinal at that time, yet selling for only 5¢, the box provides many of the reassurances patent medicines traditionally did, and promises that the product is never touched by hand. The other side features a picture of a huge factory, further enhancing the product's image as a modern, safe medicine.
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