The trucks were manufactured for nearly three decades and became one of the most widely used freight wagons in Czechoslovakia, the chassis being used for buses and fire engines as well as for military uses.

Praga launched the RN in 1933 as a traditional medium-weight truck with rigid axles and a sheet metal cab wrapped around a wooden skeleton and mounted on a ladder frame.

Production of both trucks continued through World War II, until Allied bombing damaged the plant in Libeň on 25 March 1945.

During the war, a wood gas powerplant was fitted called Imbert or Janka instead of the spark ignition engine.

[1] After the war, production resumed in a new plant in Vysočany [cs], initially using the wood gas engine.

[3] In 1938, the Kingdom of Yugoslavia launched a competition to find a truck design that would be license produced in the country.

[1] The RN won and in 1938, the Zavodi Aleksandar Ranković (ZAR), ancestor of post WWII Industrija Motora Rakovica (IMR) plant near Belgrade, started to receive parts for assembly, the first Yugoslav manufactured vehicle rolling off the production line in 1940.

[6] The RN was popularly nicknamed Erena and the RND was known as Randál, the latter not only simply a phonetic derivative of the initials but also a comment on the noisy engine.