Voting period is over. Please don't add any new votes. Voting period ends on 25 Jan 2014 at 19:54:27 (UTC)

 
OriginalM-209 cipher machine. An intermediate gear unit (center) meshes with gears adjoining each key wheel. Visible to the left of the image are the paper tape and typewheel that print out messages and ciphertext.
Reason
High EV, good composition that focuses on the interesting details, intriguing to learn more about the subject. Good quality.
Articles in which this image appears
M-209
FP category for this image
Wikipedia:Featured pictures/Engineering and technology/Machinery
Creator
Rama

Promoted File:M209B cypher machine rotors-IMG 0557.jpg --Armbrust The Homunculus 20:01, 25 January 2014 (UTC)[reply]