1969-4px, 1969 U.S. National Christmas Seals, Imperforate Proof Sheet of 100 seals, pm "B", full gum, F, NH. Fresh, firm paper, vibrant colors, never folded, shipped flat. Scan is an example. Full scan of front and back available upon request.
Issued 1969 by the National Tuberculosis Association and the Respiratory Disease Association (NTRDA). Issued by Bernice Kochan. Images of children in a circle around a Christmas tree in blocks of four. Printed by Berlin Lithography Company.
Imperforate sheets have no perforations or rouletting at all.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.