2004-10-30/2019-04-27 - From the OHS PC Database, (James H. Cook and Elizabeth Towne Schmitt, co-editors). — Active in 1988. Staff: Max Nagel. Source not listed, presumed to be personal knowledge of the editors or information supplied to them by an unnamed person.
2019-04-28/2019-04-28 - From Organ Database Builders editor Stephen Hall, April 27, 2019. — The entry for Max Nagel in Fox's Guide to North American Organbuilders states that he was a representative of Kenneth Jackson Organ Co. of Dublin, Ireland. Nagel was born in Germany in 1910, but was in St. Louis, Missouri from 1930 onward.
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