Proprietary, 1873, $5 Green & Black, Violet Paper, exceedingly well centered, rich colors with detailed impressions, neat "JHB, Nov 18/78" manuscript cancel; one perforation added and some minor surface scrapes, Very Fine appearance; with 2016 P.F. certificate. Scott No. RB10a  $11,000. A BEAUTIFUL AND RARE EXAMPLE OF THE $5.00 PROPRIETARY ON VIOLET PAPER. It is believed that only 74 stamps were issued (50 on Green paper). Examples almost invariably have faults and/or repairs, due to the stamp's large size and the nature of its use. $0 (Image)