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Model of an Optical Telegraph
anonymous, c. 1795 - c. 1800, demonstration model, NG-MC-815
Model of an Optical Telegraph
anonymous, anonymous, 1795 - 1816, demonstration model, NG-MC-813
anonymous, c. 1795 - c. 1800, demonstration model, NG-MC-815
anonymous, anonymous, 1795 - 1816, demonstration model, NG-MC-813