In 1957, Konstrukte Trenčín, in cooperation with ZKJV Dubnica nad Váhom, started the development of a rocket deminer (codename PRUNA I ).
Source : ŠTAIGL,Jan - Arms production in Slovakia in 1954 - 1960, p. 67, MILITARY HISTORY 2003/1 VHÚ Bratislava
Source : ŠTAIGL,Jan - Arms production in Slovakia in 1954 - 1960, p. 67, MILITARY HISTORY 2003/1 VHÚ Bratislava