Franklin Mint – History of US – Year of Sit-down Strikes – 1937 – 45mm – Proof Bronze Medal – There were 4,470 recorded strikes during 1937, mostly of sit-down variety – Feb 5-July 22 – President Roosevelt fails to “pack” the Supreme Court – May 6 – German dirigible Hindenburg explodes at Lakehurst, N. J. – July – Disappearance of Amelia Earhart during Pacific flight.