UNITED STATES – Luff, John N.: The Postage Stamps of the United States (1902), 417 pages with 23 loose plates in a slip case at the back, hardcover; PLUS: Luff, John N.: The Postage Stamps of the United States 19th Century. Part One: Postmasters' Provisionals (1937), 74 pages + 15 plates in a slip case at the back, hardcover; both books in good condition. Rare! Estimate: 360 Euro
