51-1x2, WX155, 1951 U.S. Christmas Seals Sheet, No pm, F, MNH. Issued 1951 by the National Tuberculosis Association (NTA). Seals 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: No printer's mark. 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.
