Late 70's/early 80's .... Ludwig wrap ..... most accounts date this around '79 .... and buy '84 it was over. Buyers had started returning drums because the wrap was SHRINKING. Some drums were returned two or three times. So Ludwig's answer was to rivet the wrap seam to the shell. Problem was ..... that wasn't a cure. The wrap still shrunk ..... and now you had rivets and rivet holes as well. Ludwig switched from 3 ply to 6 ply shells in '76, so I don't think any 3 ply shells (drums OP has) were ever riveted.
Unfortunately I have the riveted wrap, but fortunately the wrap hasn't shrunk a bit. I figured it had to be an overkill remedy to lifting seams. Like someone at the factory had had enough of returns that they said, "F-it, we're riveting the damn things on!". I get wanting to make sure the seams don't lift or an attempt to stop shrinkage, but the location of the seam/rivets and badge are what puzzle me the most. My seams are dead center of the tom mount (where they would show the most) and the badges are directly opposite (facing me). It's the opposite of where they should be, IMO.