Original Czech made 250 round ammo cans for the ZB-37 machine gun used by the Germans in Scandinavia during WWII.  During the occupation of Czechoslovakia, Germans continued production of this machinegun and called it MG37(t). This machinegun was widely used by the Waffen SS and Polizei formations. The ZB-37 was also in 7.92 mm, so the Czech ammo cans were compatible with the German machineguns.  Canvas strap has been replaced.