8-1Ax2, WX3e, 1908 U.S. Red Cross Christmas Seals, booklet pane, full gum, VF, MNH. Type 1A pane of 6, fresh and nicely centered.
Issued 1908 by the American National Red Cross (ANRC). Designed by Howard Pyle. Booklet pane of 6 (3x2), PM at L, Type 1A, carmin and green, seal size: 251/2x261/2mm, perf:14, smooth gum.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.