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Science Museum Group
© The Board of Trustees of the Science Museum
Bolton's 'Cypher wheel' for secret correspondence, a brass disc of four consecutive circles of numerals and the alphabet, the two inner circles are on a separate disc which can be rotated by a knob in the centre (2 5/16" diam.) c. 1802
Details
- Category:
- Mathematics
- Object Number:
- 1954-325
- Measurements:
-
overall: .5906 x 2.3622 in.; 15 x 60 mm
- type:
- cipher machine
- credit:
- National Maritime Museum (Gabb Collection)
