From the OHS PC Database, derived from A Guide to North American Organbuilders by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). —

Born July 1, 1894 in St. Mary's, Ohio; son of Henry H. Holtkamp, brother of Ferdinand and Mary Holtkamp, father of Walter Holtkamp, Jr.; in World War I; with father's firm of Votteler, Holtkamp, Sparling of Cleveland, Ohio, 1931, manager; with successor Holtkamp Organ Co. of Cleveland, Ohio, 1951; died February 11, 1962 in Cleveland, Ohio, age 67.

Arguably one of the most important visionary builders of the mid-twentieth century; leading actor in the post-orchestral organ reform movement in the USA.

Born 1 July 1894, St. Marys, Ohio
Died 11 February 1962, Cleveland, Ohio

[Source: Ferguson, John Allen. Walter Holtkamp, American Organ Builder. Kent: The Kent State University Press, 1979.]