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Advertising postcard for Theelin and Theelol from Parke, Davis & Co. Card features two products; Theelin in Oil and Kapseals Theelol. Theelin in Oil is tinted in green and shows 2 bottles next to the medicine's packaging box. Kapseals Theelol is tinted in red and there are several capsules next to the medicine's bottle and packaging box. On the verso, the logo of the company is printed in red. A 1 cent stamp is affixed to the card, and it's postmarked "Detroit, Mich."
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