The Sikorsky S-43 and its military cousin, the JRS-1, were designed in the late 1930s as airliners and military personnel transports. Fifty-three were built between 1937 and 1941 for civilian customers and the U.S. Navy. A total of three S-43/JRS-1s survive today. Seventeen of these aircraft were purchased by the Navy with two of them going to the Marine Corps.