51-1x1, WX155, 1951 U.S. Christmas Seals, Sheet/100, pm E, full gum, F, MNH. Issued 1951 by the national Tuberculosis Association (NTA). Designed by Robert Stephens, image of a Santa face. Fresh, full gum, never folded, shipped flat. Scan is of a full sheet.
Sheet of 100 (10x10), pink, black, red and green,. Seal size: 17x23mm, perf. 121/2x12. Printer's mark: "E" located in center top of seal #56. 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 Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.
