Dietrich Gruen Writer
Dietrich Gruen (February 22, 1847—April 10, 1911), was a German born watchmaker who emigrated to the United States in the 1860s and later founded the Gruen watch Company.
Dietrich Gruen (February 22, 1847—April 10, 1911), was a German born watchmaker who emigrated to the United States in the 1860s and later founded the Gruen watch Company.