From the OHS PC Database, derived from A Guide to North America Organ Builders by David H. Fox (Organ Historical Society, 1991). -- No Notes

Mason & Hamlin website, accessed Oct 17, 2015 --

Partnership of Henry Mason and Emmons Hamlin formed in Boston in 1854, manufactured reed organs, added pianos in 1881

Mason & Hamlin made a few pipe organs during their time under the Cable Corp, ca. 1900s-1910s - https://organforum.com/forums/forum/pipe-organs/classic-church-pipe-organs/34486-mason-hamlin-pipe-organs post by Casey "SubBase" [sic]: "The pipe organ project was announced with a press release in 1903, right after M&H's acquisition by The Cable Corporation of Chicago, so I believe it was not under the impetus or desire of the Mason family, but rather a way for Cable to leverage the M&H name to sell a few mediocre pipe organs. They were making them in 1906 according to some other literature and news articles. They were fully duplexed tubular pneumatic beasts. And actual selling point in the brochure was that the stop lists were exactly the same for each manual.(there were 3 stock models IIRC, with 3-5 ranks) The photo above matches the very degraded (xerox of a xerox) pic in the materials I have that shows 3 or 4 of them in a row in the stock rooms." [photo thumbnail remnant resembles the top of https://pipeorgandatabase.org/instruments/54037 closeup]