i have some ammunition that im not sure what it is and if anyone ever had problems with it. The headstamp starting from 12 oclock is ( z ) at 6 oclock is ( i or 1 ) and the date is ( 1939 ). The box 15 rds each it has on the box vz34/vz24 / 7.92 caliber. I bought it some years back and did not shoot it because i did no if it is worth anything for collecting purposes . I have 10 boxes of this stuff and i think i payed 4or 5 dollars a box. What do you think.?