 Bi-Level Cypher Wheel. German. Probably 18th c. Silver. 48.3 mm. Good working order. Front: outer band for level 2 substitution, inner band on moveable central disk with level 1 substitution, window displaying plain text letters. Back: names of German states, principalities, electorates, imperial titles, with numerical codes of unknown significance. Most likely rare.
Provenance unrecorded.
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