NWF 8-250A.26, 1963 National Wildlife Federation Annual Charity Seals Sheet, full gum, MNH. Issued 1963 by the National Wildlife Federation (NWF). Images of wildlife which are required to complete the 1963 Annual Album. Sheet of 36 (6x6) seals, with 24 seals 62x42mm and 12 seals 62x84mm, PM@T, Perf. 121/2 multicolored. No perf breaks, great color, shipped folded into quarters.
NWF Annual Charity Seals are usually classified as Charity Seals, or Cinderella Stamps.