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). - In Sharon Hill, Pennsylvania beginning c. 1995. Source: American Institute of Organbuilders (AIO): 1996 membership directory.
2010-05-28/2018-07-29 - From the OHS PC Database, (James H. Cook and Elizabeth Towne Schmitt, co-editors). — Established in Collingdale, Pennsylvania in 1995. Source: From Adam F. Dieffenbach, service manager for the firm.
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