17-3.2x6.5, WX19b, 1917 U.S. Red Cross Christmas Seals Sheet, Type 3, F, No Gum. Sheet may be reinforced. Sheet has never been folded, shipped flat. Scan of a full sheet. Sheet was larger than scanner, part of last column not scanned.
Issued 1917 by the American National Red Cross. Designed by Thomas M. Cleland. Typographed by Eureka Specialty Printing Co. Plate C with union label opposite seal #91, position 8. Sheet of 100 (10x10), SE4S, red and green. Seal size: 20x22mm, perf. 12x12:00, No Gum.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.