1941-1pcp, WX104, 1941 U.S. Christmas TB Seals, Progressive Color Proofs, perf. 121/2x12, full gum, P4S, MNH.
A complete set of seven (7) stages showing color plate separations and the final design. Scan is an example of the item.
Progressive Color Proofs are usually issued in sets to show colors separately and in combination.
Issued by the National Tuberculosis Association (NTA).
Christmas TB Seals are also known as Christmas Seals, and are usually classified as Charity Seals, or Cinderella Stamps.
