9-1x, WX5, 1909 U.S. Red Cross Christmas Seals, Sheet/100, Avg., NH.
Issued 1909 by the American National Red Cross. Designed by Carl Wingate. Lithographed by Strobridge Lithographing Co., carmen and green, sheet of 100 (10x10) SE4S, seal size: 23x23mm, perf. 12.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.