Centerfire has Turkish 7.92x57 at $29.99/150 rds. I had ordered 450 back when it was $45 and it’s indeed Turk. Just ordered another 1500 rds for $315 delivered.
Much of what I received a few months ago was nickeled IFRC. Will check later, or advise once my 1.5M arriveJacket on 1950s Turk is brass color and I remember it as non-magnetic. Some one could check.
No way to select dates from online sellers though, Gun show buyers might look for it.