Autoharp : patented May 9th, 1882, with new system of figure music / manufactured by C.F. Zimmermann Co.
A trade catalogue for the autoharp, a zither-like instrument with chord bars, published by C.F. Zimmermann Co. of Dolgeville, New York, in 1882 to promote its patented figure-music system to buyers and players. The pictures show the instrument from several angles, with strings running across a wooden body, a fretted chord-bar panel, and numbered figure-music labels, drawn in fine black line with clear, engraved detail a designer could borrow for vintage instrument diagrams.
