Thanks, Jim. I wish I knew even a small bit of what you do about these rifles, but I've begun educating myself. I've come across that site before on some searches and didn't connect the dots that they had an entire forum dedicated to Yugoslav Mausers. Thanks very much for that. I've not come across anything about barrel markings yet. Can any insights be gleaned from those? In case there can, I'm posting pics of the TRZ-5's barrel marks.