United Air Lines Mainliner Flying over Golden Gate Exposition

Front:
NC 16O87 USHAIL EXPRESS Mainliner UNITED AIR LINES MAINLINER FLYING OVER GOLDEN GATE INTERNATIONAL EXPOSITION

Back:
9 A-H439 AIR LINES A United Air Lines 12-ton Main- UNITED liner flying over the Golden Gate International Exposition on man- made Treasure Island in the center of San Francisco Bay. United's Mainliner has a top speed of 212 m.p.h., cruises at more than 180 m.p.h. at only 50% of power and carries 21 passengers. Please address and return to stewardess who will stamp and mail card for you. "C.T.ART-COLORTONE' POST CARD (REG.U.S.PAT.OFF.)