2004-10-30/2019-11-10 - From the OHS PC Database, derived from A Guide to North American Organbuilders, by David H. Fox (Richmond, Va.: Organ Historical Society, 1991). — Son of John B. Schaefer; with family firm in Schlesingerville {later renamed Slinger}, Wisconsin, from 1919 to unknown date. Source: The Diapason February 1919, 16.
2015-10-16/2020-04-09 - See main entry: Schaefer Organ Co.
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