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Back view of upright pianoforte

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Back view of upright pianoforte.jpg Iron plate for upright pianoforte with Agraffes (Mehlin patents)ThumbnailsUpright action showing lost-motion deviceIron plate for upright pianoforte with Agraffes (Mehlin patents)ThumbnailsUpright action showing lost-motion deviceIron plate for upright pianoforte with Agraffes (Mehlin patents)ThumbnailsUpright action showing lost-motion deviceIron plate for upright pianoforte with Agraffes (Mehlin patents)ThumbnailsUpright action showing lost-motion deviceIron plate for upright pianoforte with Agraffes (Mehlin patents)ThumbnailsUpright action showing lost-motion deviceIron plate for upright pianoforte with Agraffes (Mehlin patents)ThumbnailsUpright action showing lost-motion device

Back view of upright pianoforte, Knabe patents, showing ribbing of sound-board and construction of back framing.