GREAT BRITAIN – Voorbraak, A.: British Mail Overseas 1840 to UPU, 138 pages, hardcover; PLUS: Voorbraak, A.: The Postal History of Edinburgh 1590–1902 (1997), 126 pages, hardcover; PLUS: Simpson, Ray / Louis, Karl: Great Britain Victorian Mixed-Franking Covers Illustrating Postage Stamp Development (2020), 288 pages, hardcover, signed by Karl Louis. All three books as new! Estimate: 150 Euro
