When did the father of George J. Gruen pass away ?
George J. Gruen George J. Gruen (1877–1953) was an American watchmaker who managed the Gruen Watch Co. He was the second son of the founder Dietrich Gruen.
George, Duke of Mecklenburg George, Duke of Mecklenburg (German: "Georg Herzog zu Mecklenburg" ; 5 October [O.S. 22 September] 1899 – 6 July 1963) was the head of the House of Mecklenburg-Strelitz from 1934 until his death. Through his father, he was a direct descendant (great-great-grandson) of Russian Emperor Paul I.