UNITED STATES – Johl, Max G. + King, Beverly S.: The United States Postage Stamps of the Twentieth Century (1934–37). Volume I: 1901–1922, 371 pages; Volume II: Commemoratives 1923–1933, 261 pages; Volume III: 1922–1935 Parcel Post / Air Mails, 286 pages. All three volumes hardcover, vol. III is a de-luxe edition with No. 56 of the 100 half leather volumes produced and signed by the author (the cover has a few small faults). A rare set! Estimate: 200 Euro
