I appreciate the comments, and a look at the old Forum entry, which I don’t recall seeing before. Of course, this caliber is not of particular interest to me; it was just that I didn’t recall seeing that headstamp on anything before.
It is clearly of Yugoslav manufacture. However, a denial of manufacture by Igman doesn’t mean a whole lot. That comment appeared on the old Forum, and someone gave a very true answer that companies are often reluctant to divulge contract information, sometimes to the point of complete denial of something they actually did make. I, personally, have no opinion on whether it is Igman or PPU, since their ammo often looks identical, and there have been forum identifications before, with documentation, that what we all thought was made by one, was actually made by the other.
As far as the meaning of the JMS headstamp, if actually made for troops in the Middle East, “Joint Military Services” might make some sense. I will research the time-line for the two Iraq Wars in relation to the 2002 date on the headstamp. Right now, we can only call that identification of the initials an “educated guess.” I am pretty sure it would not be Joint Military Sales.
The old forum alludes to a box and even an ammo can, but with no pictures. Neither was available with the single cartridge in question. I assume, though, from the old Forum comments, that they are common among those interested in the 7.62 x 54R.