2004-10-30/2019-09-20 - Note from the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). - Active in Millersville, Pennsylvania, 1995. Staff: James R. McFarland; William J. Napier. Sources: Organ Handbook (Richmond, Va., Organ Historical Society, 1995), 68.
2019-09-21/2019-09-21 - From Organ Database Builders editor Stephen Hall, September 20, 2019. — Apparently the firm closed and turned its customers over to Columbia Organ Works circa 2017. A web search yields a single webpage with the message: Thank you for 24 ½ years! We have closed our doors. You will be redirected in a few seconds to Columbia Organ Works who will be available to service your instrument. Source: S.D.G. Pipe Organs website, accessed September 20, 2019, http://sdgorgans.com/.
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