NAACP 7-5620.45x, 1973 NAACP Charity Seals Sheet, full gum, F, MNH. Issued 1973 by the NAACP, New York, NY. Two designs with image of Christmas Seal, red, yellow, green, dark blue, seal size: 18x22mm, perf. 121/2. Sheet of 100 (10x10) seals, SE3S, PM@B, "We Must Still Invest in Freedom" in bottom margin. Full color, firm paper, shipped flat.
NAACP Charity Seals are usually classified as Charity Seals or Cinderella Stamps.