2004-10-30/2022-03-09 - From the OHS PC Database, derived from *A Guide to North America Organ Builders* by David H. Fox (Organ Historical Society, 1991). -- Listed as builder of c. 1898 organ at St. Peter Claver R. C., Phildelphia, PA.
2022-03-09/2022-03-10 - Listed in 1894 & 1895 Philadelphia City Directories. Shop was located at 1022 Buttonwood Street, Philadelphia. Also listed Julius Neef involved in the business. By 1907 directory, he is listed as a "Manager," in 1909, listed as "Salesman", companies not identified. In 1916, his trade is listed as "Engineer". See firm listing: [J. B. Didinger & Co.](https://pipeorgandatabase.org/builder/3085) -Paul R. Marchesano
Regrettably, it is not possible to display the information about the sponsor of this pipeorgandatabase entry or if there is a sponsor. Please see About Sponsors on Pipe Organ Database.