I found a sheet of what I thought were stamps from 1961 at an antique store. Intrigued by the Don Draperness of them, I inquired since there was no postage amount visible. Apparently there used to be (and still are) such things as Cinderella stamps which are seals resembling postage stamps aimed to raise awareness for diseases, most often TB. They were introduced in the U.S. in 1907 and were hugely popular—in fact, they continue to be produced today. Although I had never seen one until now, you can get them here ($10 for a sheet, $20 for five sheets), all proceeds go to The American Lung Association. Kinda cool! And almost makes up for this year's seriously sub-par Holiday stamps by the USPS.