Otzen Johannes (1839-1911), Pianino. Monthly competition June 1875 (): Riss front view, side view, partial cut; Scale bar. Ink on cardboard, x cm (including scan edges) Otzen Johannes (1839-1911): Pianino. Monatskonkurrenz Juni 1875

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Keywords: auf, johannes, karton, maßstabsleis, otzen, teilschnitt, tusche