When did the father of George J. Gruen pass away ?
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.
George Grunert George Grunert was a United States Army cavalry officer who worked his way up through the ranks from private to retirement as a Lieutenant General. His 47-year career extended from the Spanish–American War to the end of World War II.