SCAMP machinery production. Organisation of dots indicates which station of the machine (up to 24) the case was drawn and bunted and filled on... read up on SCAMP ( Small Calibre Ammunition Manufacturing Program details. Machinery devised by Gulf+Western in the late 60s-thru 80s, now used widely in US type factories for dedicated mass production of 7,62 Nato, and 5,56 x45 Nato ammo.
Basically a continuous production "machine" which takes raw materials at one end, and by an interlocked series of Rotary presses, spits out finished ammo at the other end.
Takes usually 6-8 weeks to tool up, but then can produce for weeks at a time.... even missing shutdown time by a few minutes can result in thousands of extra rounds produced.
All processes computer controlled, and system uses a minimum of "Workers" in White coats and "Clean Rooms"
Regards,
Doc AV