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.
John M. Walker Dr. John Mercer Walker, Sr. (January 15, 1909 – August 16, 1990) was an American physician and investment banker. A member of the prominent Bush-Walker family, he was a maternal uncle of US President George H.W. Bush.