52-4x2, WX160, 1952 U.S. Christmas Seals Sheet, pm U, with Union Label. Issued 1952 by the National Tuberculosis Association (NTA). Designed by Thomas Darling. Image of candle and double-barred cross. Fresh, never folded, shipped flat. Scan is of a full sheet.
Sheet of 100 (10x10), yellow, black, red and green. Seal size: 171/2x231/2mm, perf.121/2. Printer's Mark: "U" on the green background, between the candlestick and its tray, in lower right corner of seal #56. Union Label: green union label in the bottom margin under seal #100.
Note: Sheets of 1952 Christmas Seals were printed by 5 printers. They can be identified by a tiny black "E, S, D, U, or F" on seal #56.
Marginal inscription at bottom of sheet: "Chest X-Rays Find Tuberculosis Early When It's Easiest To Cure" with red double-barred cross at beginning and end of text. Perforations run through margin.
Christmas Seals are also known as TB Charity Seals, and are usually classified as Charity Seals, or Cinderella Stamps.
