Identified through information published in John Ferguson's Walter Holtkamp: American Organ Builder (DMA treatise, Eastman School of Music, 1976). Although neither Votteler-Holtkamp-Sparling nor their successor Holtkamp Organ Co. assigned Opus numbers to their instruments, this organ was identified in factory documents as Job number 1585. That number appears here as the Opus number of this instrument.An additional note in Ferguson's list identifies this as Portative No. 1.We received the most recent update for this note from Database Manager on April 09, 2020.
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