Updated through online information from James R. Stettner. This is a rebuild of an existing organ. Identified by James R. Stettner, based on information from personal research into the history of organs in Lawrence, Massachusetts.
The Estey case and pipes were [mostly] retained. The Great stoplist was unaltered excepting that a new 8' Open Diapason replaced the original - which was transposed to the Pedal at 8' & 4' pitches. The Swell 4' Harmonic Flute was replaced with a new 8' Salicional, and the original 8' Keraulophon became a Voix Celeste. While the console stop control said 4' Harmonic Flute, the pipes playing were the original Johnson 4' Fugara.
Identified by James R. Stettner through information from the Estey Opus List, published in The Boston Organ Club newsletter, 1973-1979.