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A M-209-B ENCRYPTION MACHINE, SUPPLIED BY L.C. SMITH & CORONA TYPEWRITER INC., American, mid 20th century, image 1
A M-209-B ENCRYPTION MACHINE, SUPPLIED BY L.C. SMITH & CORONA TYPEWRITER INC., American, mid 20th century, image 2
A M-209-B ENCRYPTION MACHINE, SUPPLIED BY L.C. SMITH & CORONA TYPEWRITER INC., American, mid 20th century, image 3
Various Properties
Lot 33

A M-209-B ENCRYPTION MACHINE,
SUPPLIED BY L.C. SMITH & CORONA TYPEWRITER INC., American, mid 20th century,

15 September 2021, 14:00 BST
London, Knightsbridge

Sold for £1,275 inc. premium

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A M-209-B ENCRYPTION MACHINE, SUPPLIED BY L.C. SMITH & CORONA TYPEWRITER INC., American, mid 20th century,

Serial no.126482, the green metal casing with 6 adjustable key wheels at the front, the left side with enciphering knob and power lever on the right, letters printed on paper tape, complete with hinged lid mounted with paper tape reel and associated accessories, together with print-out copy of the 1942 instruction manual,
7in (18cm) wide

Footnotes

The M-209-B was designed by the Swedish cryptographer Boris Hagelin, and produced by the New York-based manufacturers Smith & Corona. The machine was used by the United States armed forces throughout World War II and saw continued service during the Korean War. Entering text was a manual process performed by setting the alphabet ring to the desired letter, then turning the right-hand knob one full rotation, repeating for each individual letter. This laborious process was offset by the machine's compact size and it not requiring any electricity to operate, which provided greater portability compared to the German Enigma machines.

Additional information

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