8-2.2x4, WX4a, 1908 U.S. Red Cross Christmas Seals, booklet pane, full gum, VF, MNH. Watermarked paper, Type 2, booklet pane of 6 seals, fresh, and nicely centered as well.
Issued 1908 by the American National Red Cross (ANRC). Designed by Howard Pyle. Booklet pane of 6 (3x2), PM at L, Type 2, carmin and green, seal size: 251/2x261/2mm, perf 12, smooth gum.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.