1958 ZIL-157 BM-13NM
Katyushas of World War II, the first self-propelled artillery mass-produced by the Soviet Union, were usually mounted on trucks. This mobility gave the Katyusha (and other self-propelled artillery) another advantage: being able to deliver a large blow all at once, and then move before being located and attacked with counter-battery fire.
This variant BM-13NM uses postwar chassis ZIL-157 and was produced since 1958 to middle of 1960s.