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John Koster

Former Curator of Keyboard Instruments at the National Music Museum, University of South Dakota (1991–2015), a 20-year Boston-area harpsichord maker in his own right, and a recipient of the American Musical Instrument Society's Curt Sachs lifetime-achievement award. Matters to this vault as the named domain-expert reviewer whose Early Music America piece on The Boston School of Harpsichord Building is the Tier-2 anchor for the vault's claim that Hubbard and Dowd's 1949 Boston workshop drove the historical-construction reversal — a practitioner-historian reviewing, in a trade venue, the makers' own firsthand reminiscences.

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