C13-15, 1930 65c-$2.60 Graf Zeppelin, complete set tied by "Washington D.C. Apr. 19 2PM 1930" date of issue duplex cancels to 5c Blue airmail entire (UC1) to Chevy Chase, DC, three cachets including "This article made the complete round trip via Graf Zeppelin", backstamped Friedrichschafen May 6 and New York June 18, very fine, a spectacular first day cover of the 1930 Graf Zeppelin issue, even more desirable on an airmail envelope with red and blue border (Scott $10,000)