UNITED STATES of AMERICA. 15c Benjamin Franklin – Gray. 12 Single-line watermark Issue. USED, XF/Superb, very well-centered. With bright color, jumbo margins and. A light black cork cancellation. There are NO faults. 2006 PSE certificate #1031619 (graded 95J) &. 2009 PF certificate #482696 (graded 95J). If you have questions regarding this 15c 1912 Washington-Franklin, contact Christopher Rupp. Rupp Brothers – established in 1975 – our 50th year in business as professional philatelists. Contact Christopher Rupp to sell your graded Postally Used stamps. Well-centered stamps, especially those graded 95, 98 and 100, are wanted by Rupp Brothers’ discriminating customers. Professional Stamp Experts and Philatelic Foundation certificates are preferred. For almost fifty years Christopher has been working with collectors who build collections of the finest quality postally used stamps. You will receive candid answers to your questions and a strong market-price offer for your high-quality stamps.