2004-10-30/2019-04-29 - From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). - Born March 7, 1812 in Germany; brother of Johann Heinrich Koehnken; active in Cincinnati, Ohio, c. 1845 until his death ca. 1863. Source: Martin Kares, The German Element in American Organbuilding, 1700-1900 (dissertation, Marburg 1990).
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