High Quality Content by WIKIPEDIA articles! The Martin M-130 was a commercial flying boat designed and built in 1935 by the Glenn L. Martin Company in Baltimore, Maryland, for Pan American Airways. Only three M-130s were built: the China Clipper, the Philippine Clipper and the Hawaii Clipper. A fourth flying boat (designated as M-156) called the Russian Clipper was built for the Soviet Union which was essentially identical to the three Pan Am models except that it had a larger wing (giving it a longer range) and twin vertical stabilizers.