1907 $20 High Relief, Flat Rim MS64 PCGS. According to the reference book The Coinage of Augustus Saint-Gaudens by James Halperin, Mark Van Winkle, Jon Amato, and Gregory Rohan, about 33% (the final 4,000 pieces or so) of the 12,367 1907 High Relief double eagles were of the Flat Rim variety; however, their survival rate is much lower with probably no more than 20% to 25% of the Flat Rims extant today. Current PCGS Census shows 150/125 graded in 64/higher of the Flat Rim Type, while their Wire Rim counterpart's census shows a whopping 997/362 ! The Flat Rim type seems like such a bargain when these comparisons are shown.