This is a rebuild of an existing organ. Identified by James R. Stettner, using information from this web site: http://www.stpaulcathedral.org/music-st-pauls-organ. -- According to the church website, in the section about the organ, "In 1915, the organ was enlarged by the Johnston Organ Company." It is not clear if this included electrification of the action, new windchests, etc.
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