Two 50s posters by Henri Ott

From "Rare and Important Travel Posters" auction from Swann Galleries, New York, 2013

 HENRI OTT (1919-?) SWISSAIR / BY SWISSAIR TO THE UNITED STATES / DOUGLAS DC - 6B. Circa 1952. 

HENRI OTT (1919-?) SWISSAIR / BY SWISSAIR TO THE UNITED STATES / DOUGLAS DC - 6B. Circa 1952. 

 HENRI OTT (1919-?) SWISSAIR / BY SWISSAIR TO THE UNITED STATES / DOUGLAS DC - 6B. Circa 1952. 

HENRI OTT (1919-?) SWISSAIR / BY SWISSAIR TO THE UNITED STATES / DOUGLAS DC - 6B. Circa 1952.