A ca. 1920 rare French encryption device based on sliding alphabets. Marked: “Codes Télégraphiques Georges LUGAGNE” and “Transpositeur á permutations secretès.” Manufacturer is “BARBOTHEU,17, Rue Béranger, PARIS.” Precious bone on boxwood slides in boxwood frame with a steel base. Serial number: “587″.
The Richard Brisson coding devices site claims that this was the predecessor of “ ‘The Sphinx’ made by the Society of Telegraph Codes Lugagne Georges (France) circa 1920-1930 ”
Instrument is in excellent cosmetic and mechanical condition.
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