I just took my VZ apart to clean all the cosmo out of it and found some odd marks. It has the RR prefix of the Romanian contract rifles. first one that I found was what looks like a "C" on its back with two dots above it. It has a 62 stamped under the barrel. Next to the 62 is a M in a square and another square that looks like its quartered or might be somthing else. There ar Z's in circles stamped all over it. So has this rifle been all over the world or are these normal proof marks?