27-3x, WX41, 1927 U.S. Christmas Seals Sheet, full gum, F, MNH. Fresh, firm paper, vibrant colors, gum, never folded, shipped flat.
Issued 1927 by the National Tuberculosis Association. Designed by John W. Evans. Image of Santa, sleigh and reindeer, sheet of 100 (10x10), Perf. 121/2, size: 241/2x18mm, colors: black, red, yellow, and blue.
Printer's mark - two red dots at the center of the sheet between seals #45, 46, 55, 56, and one red dot in the outer margin at the lower left corner of #41, which indicates printing by United States Printing and Litho. There are no slogan or portrait seals.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.