53-4x, WX156, 1953 U.S. Christmas TB Seals, Sheet/100, pm U, F, MNH. Issued 1953 by the National Tuberculosis Association (NTA). Designed by Elmer Jacobs and E. Willis Jones. Image of a Caroler. Fresh, never folded, shipped flat. Scan is of a full sheet.
Sheet of 100 (10x10), gold, red, green, and black. Seal size: 23x171/2mm, perf. 121/2. Printer's Mark: "U" on the red mitten in the lower right corner of seal #56. Union Label is on the perforated margin. A top marginal inscription "Your Tuberculosis Association Helps To Keep All Homes Safe From Tuberculosis."
NOTE: Sheets of 1951 Christmas Seals were printed by 5 printers. They can be identified by a tiny black "E, S, D, U, or F" on seal #56.
Christmas Seals are also known as TB Seals, and are usually classified as Charity Seals, or Cinderella Stamps.