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Back view of upright pianoforte

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Back view of upright pianoforte.jpg Sketch of iron plate for concert grandThumbnailsJonas Chickering’s full solid cast grand metal plateSketch of iron plate for concert grandThumbnailsJonas Chickering’s full solid cast grand metal plateSketch of iron plate for concert grandThumbnailsJonas Chickering’s full solid cast grand metal plateSketch of iron plate for concert grandThumbnailsJonas Chickering’s full solid cast grand metal plateSketch of iron plate for concert grandThumbnailsJonas Chickering’s full solid cast grand metal plateSketch of iron plate for concert grandThumbnailsJonas Chickering’s full solid cast grand metal plate

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