Research Papers and Reprints Title Categories Update Date Download U.S. VENDED POSTAL INSURANCE (1965-1985)1 104 downloads Exhibits June 30, 2021 Download Exhibit: The U.S. “Pictorial Issue” of 1869 & Its Use1 133 downloads Exhibits February 21, 2019 Please login to download Exhibit: Lincoln Definitives – The 4 Cent & 5 Cent Issues 1890-19081 104 downloads Exhibits February 23, 2019 Please login to download Exhibit: Series 1902 – United States1 168 downloads Exhibits February 21, 2019 Please login to download Exhibit: Jamestown 19071 116 downloads Exhibits February 21, 2019 Please login to download Exhibit: Washington-Franklins Design & Stamp Development1 132 downloads Exhibits February 23, 2019 Please login to download Exhibit: Washington-Franklins, 1908 – 1922 Earliest Documented Use1 123 downloads Exhibits February 23, 2019 Please login to download Exhibit: Washington – Franklin 1¢1 155 downloads Exhibits February 23, 2019 Please login to download Exhibit: Washington, Franklin, Head Series Postal History: Rates and Use 1908-19231 172 downloads Exhibits November 9, 2020 Please login to download U. S. Postal History of Companies Using Perforated Control Marks1 110 downloads Exhibits February 21, 2019 Please login to download Exhibit: Purple Horrors: U.S. 3¢ Commemoratives 1904 – 19451 109 downloads Exhibits February 21, 2019 Please login to download Exhibit: Washington-Franklins on Cover and Piece1 145 downloads Exhibits November 13, 2019 Please login to download Exhibit: Martha Washington1 93 downloads Exhibits February 23, 2019 Please login to download Exhibit: Use of the Presidential Issue of 19381 137 downloads Exhibits February 21, 2019 Please login to download Exhibit: Prexies at Work1 113 downloads Exhibits February 21, 2019 Please login to download Exhibit: U.S. Registry System – The First 75 Years1 100 downloads Exhibits February 21, 2019 Please login to download Exhibit: B.E.P. Produced Great Americans Issues1 132 downloads Exhibits February 21, 2019 Please login to download Exhibit: Three-Cent Stamps of the 1954 Liberty Series1 106 downloads Exhibits August 26, 2015 Please login to download Exhibit: Uses of the 1954 Liberty Series1 136 downloads Exhibits February 21, 2019 Please login to download Prominent Americans1 166 downloads Exhibits February 23, 2019 Please login to download Exhibit: Tomorrow’s Classics / (U.S. Flag & Transportation Coil Issues of 1981)1 118 downloads Exhibits February 21, 2019 Please login to download Exhibit: OCR Bar Codes 1983 – 1987 / Half a Decade of Human and Machine Errors1 65 downloads Exhibits August 4, 2015 Please login to download