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Keywords: M-209 mechanical cipher machine, Smith Corona - National Electronics Museum - DSC00201.JPG en Exhibit in the National Electronics Museum 1745 West Nursery Road Linthicum Maryland USA All items in this museum are unclassified The museum permitted photography without restriction 2014-07-21 14 48 08 own Daderot cc-zero Uploaded with UploadWizard Cryptography equipment in the National Electronics Museum M-209 |