20-2Bx, WX27, 1920 U.S. Christmas Seals Sheet, Type 2B, full gum, F, MNH. Sheet has never been folded, shipped flat. Scan of front and back.
Issued 1920 by the National Tuberculosis Association (NTA). Designed by Ernest Hamlin Baker. Image of Santa carrying child on his shoulder. Sheet of 100 (10x10), red, green, and blue. Seal size: 181/2x23mm, perf. 121/2. Offset by Strobridge Lithographing Co. Plate B - flaws: left end of the lower arm of the cross is rounded on seals #34, 35, 84, 85. Type 2B seals were printed by Strobridge Lithographing Co.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.