Subject:
Denmark, 1933-1948, 1949-1956, 1933-1956, 20th Century, Production, Errors and Varieties, Printing, Engraving, Production -- Sheets and Panes, Definitive Issues, Booklets and minipacks, Parcel post, Commemorative issues, Semi-postal Issues, Plate blocks and numbers, Marginal Markings and Imprints, Blocks, Provisionals and forerunners, Overprints and surcharges, Faroe Islands, Greenland, Catalogs and Price Lists