RB21, and RB23) used improperly as documentaries, along with Scott #R154, 1-cent Franklin provisional overprint, paying the 2 cents tax on an August 1898 check from Eugene, Oregon. A very coloful combination of stamps, with the 3 proprietary battleship revenues adding up to the missing...
Revenue Unit Columns from The American PhilatelistA reprint of the Revenue Unit columns that appeared in the AP from 1928 to 1942 by Beverly King, Justin Bacharach & George Turner 1981, 237 pages, cloth $40.00, sold out U.S. Private Die Revenue Stamps, a Look at Design and Execution by ...