The 1930 OW-X was a modified Swallow with a 300-gallon fuel tanks for an endurance flight that was never made. A single place open cockpit biplane, the single example, NX952W c/n 1, was powered by a 150hp Hisso A, and later a 110hp Dayton Bear.
It was converted into a seaplane in Kentucky in 1931.
All Aero 