It was designed and produced before World War II by Poland's Cipher Bureau for prospective wartime use by Polish military higher commands.
[3] It was built in Warsaw, to the Cipher Bureau's specifications, by the AVA Radio Company.
From spring 1941, an LCD was used by the Polish Team Z at the Polish-, Spanish- and French-manned Cadix radio-intelligence and decryption center at Uzès, near France's Mediterranean coast.
It lacked a commutator ("plugboard"), which was one of the strong points of the German military Enigma machine.
These shortcomings did not imply that the LCD, somewhat larger than the Enigma and more complicated (e.g., it had a switch for resetting to deciphering), was easy to solve.