1919-1.2, WX24b, 1919 American Red Cross Christmas Seal - Type I, perf 121/2x12, full gum, VF, MNH. Issued 1919 by thr American Red Cross. Designed by Ernest Hamlin Baker. Image of Santa standing behind a sack with a red cross on front.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.