The father of George J. Gruen emigrated to the United States during what decade?
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. Dietrich Gruen: Dietrich Gruen (February 22, 1847April 10, 1911), was a German born watchmaker who emigrated to the United States in the 1860s and later founded the Gruen watch Company.
1860s