1924 Around The World Flight, United States Air Force. Purple 2-line cachet on 1¢ green postal card canceled "Santa Monica, Mar 17, 1924" duplex postmark, Santa Monica first leg cachet and "Douglas World Air Cruisers" handstamps on front and reverse, 1¢ Wash-Frank tied by Seattle, Wash. postmark, Very Fine. AAMC No. 1025. Scott No. 543+UX27  Estimate $100 - 150. $0 (Image)