The RBM radio station was a modernized version of the RB radio station, and after WW2 it was also produced under license in Poland and East Germany. The 1st Czechoslovak independent brigade in the USSR used this radio station for the first time in the battles of Kiev. They served as a connection between the troops, the regimental headquarters, and brigade headquarters. Later they were also used for reconnaissance. The radio station in the MHI collection was destroyed by a mortar attack in September 1944. It happened during a reconnaissance led by the 2nd Platoon of the 1st Battalion near Dukla, in the woods southeast of the village Palacůvka. The platoon advancing behind the reconnaissance buried the dead and sent the radio station for repair. It was delivered to Prague in May 1945 by the plant and handed over to the MHI.