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). - With Möller firm of Hagerstown, Maryland, 1922. Sources: The Diapason, February 1922, 9.
2015-08-29/2019-02-05 - See main entry: M.P. Möller, Inc.
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