Model of an Optical Telegraph, anonymous, c. 1798 - c. 1803 demonstration model Model of an optical telegraph on ground board, incomplete. It consists of a studited mast short gallows at the top. Sports were installed between two of the four braces to climb the mast. With hoists by discs in the struts of the gallows, two wooden wings are moved halfway through the mast; Two other signals that are now missing, probably balls, are hoisted up and down with hoists over discs in the gallows. The wings are motivated on a metal ring, which can freely turn around the mast: by means of a rod you can rotate with the ring with wings, so that they will be placed in another communication line. Traces of a missing component, possibly the flagpin, can be observed at the top of the gallows. Scale 1:45 (scale on model). Netherlands wood (plant material). brass (alloy). ivory. rope