全部拍賣 / Furniture, Design & Mirrors / Early 20th century British Military 5-inch Mk V heliograph m...
3d 7hGB
Early 20th century British Military 5-inch Mk V heliograph m...
Early 20th century British Military 5-inch Mk V heliograph mirror assembly ('Helio 5'), numbered 38069, with circular signalling mirror, adjustable brass mounting frame and sighting mechanism. Designed to transmit Morse code messages over long distances using reflected sunlight. (B.P. 21% + VAT))
估價:$39.98
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$39.98
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