In the central part eagle - State Emblem of the Republic of Poland. In the background tables of letters, including mintmark bottom right, and an outline of the Enigma cipher machine operation diagram. A semicircular inscription, RZECZPOSPOLITA POLSKA 2007 and 100 Zl.
Description reverse
On the left and on the right, stylised light bulbs from the Enigma cipher machine, surrounded by two groups of circles reflecting beams of light. At the top, in three rows, letters of the alphabet connected by lines with two rows of letters below. Under the bulbs 75. ROCZNICA ZlAMANIA SZYFRU ENIGMY
