At the behest of Archer Gibson, private organist to Charles Schwab, the 1904 Aeolian Organ was rebuilt and doubled in size at a cost of $21,500. With 62 ranks, this was Aeolian's first four-manual organ, and their first to include a 32' pedal stop. In 1919, at a cost of $23,457.50, the organ was extensively altered and another 12 ranks were added. Archer Gibson, who was retained for $10,000 per annum, recorded the Schwab organ in 1921, making them some of the earliest recordings of organ music. In 1932, the National Broadcasting Company engaged Gibson to play a series of Wednesday night radio broadcasts from the Schwab mansion.

As "Riverside" was about to be razed in 1948, the organ was purchased from the wrecking company by Eric Sexton of New Canaan, Conn. Mr. Sexton partially installed the organ in his house in Camden, Maine. The Schwab console shell was given to Charles Courboin, Sexton's former teacher, who displayed it in his apartment in Washington Heights.

Updated through online information from Steven E. Lawson.

This is a rebuild of an existing organ.
Identified by Steven E. Lawson, using information found in Factory Specification.
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