Robert A. Siegel, 1988 - 2013, über 230 Stück, dabei 13 hervorragende Hardcover-Kataloge “Sale 804 United States Postage Stamps The Robert Zoellner Collection”, “Sale 901 The 1918 24c Inverted “Jenny” Plate Number Block”, “Sale 912 The Rush 1847 Cover”, “Sale 988 The Steven C. Walske Collection Special Mail Routes of the American Civil War”, “Sale 993; 994; 996; 1006 The Wagshal Collection of Classic United States Stamps Part 1-4”, “Sale 995; 998 The Raymond Vogel Collection Part 1&2”, “Sale 1009 The David Golden Collection of Hawaiian Stamps & Postal History”, “Sale 1041 The William H. Gross Collection United States”, “Sale 1045 Hawaiian Postal History from the Steven C. Walske Collection”, gute Erhaltung
