2004-10-30/2024-10-21 - From the OHS PC Database, derived from *A Guide to North American Organbuilders*, by David H. Fox (Richmond, VA.: Organ Historical Society, 1991). — Partnership of Frederick W. Roseler and Elmer H. Hunholz in Milwaukee, Wisconsin, 1923-(1950s?); player mechanisms. Staff: L. J. Hoskins. Sources: *The Diapason* September 1930, 31. Elizabeth Towne Schmitt.
2024-10-21/2024-10-21 - Updated through online information from Joy Anderson (October 19, 2024): Company was in business through the 1970s. -Jim Stettner
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