1937-4xD, WX89, 1937 U.S. National Christmas Seals Sheet, pm U, full gum, F, MNH. Issued 1937 by the National Tuberculosis Association (NTA). Designed by A. Robert Nelson. Image of a town crier. Fresh, firm paper, never folded, shipped flat.
Sheet of 100 (10x10) seals, 96 regular seals with four slogan seals. Colors: yellow, black, red, blue. Seal size: 24x18mm.
1937-4xD the flaws have been removed, and there is no printer's mark.
Slogan Seals: there are four slogan seals in the following positions which show the double-barred cross and wording is as follows: Seal #23: "Health for All"; Seal #28: "Protect Your Home"; Seal #73: "Preventable"; Seal #78: "Curable".
1937 Christmas Seals were printed by four printers, Eureka "E" (WX88), Strobridge "S" (WX89), Edwards and Deutch "D" (WX89), and U.S. Printing "U" (WX89). A letter "E" "D" or "S" appears on seal #56, or "U" appears on seal #55.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.