`Polygraphic papers' coder/de-coder by D'Montfort.

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Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

`Polygraphic papers' coder/de-coder by D'Montfort. Late 18th century

Details

Category:
Mathematics
Object Number:
1991-372
Measurements:
Open: 205 mm x 360 mm x 12 mm, .34 kg
Closed: 205 mm x 180 mm x 24 mm, .34 kg
type:
cipher machines
credit:
Christie, Manson and Woods Limited