Ok, so in this section of the forum there are lots of threads preaching the virtue of MIJ drums. This isn't one of them.
I have just started restoring a WMP Apollo snare. Familiar territory: Slingerland copy lugs, thin luan shell with re-rings, etc. The strainer, however, just makes me shake my head. I dont know if it's a copy of an early Gretsch or Slingerland design, but it's cheap looking and, even though it's incomplete, I'm guessing it wouldn't work too well even if it were. Wow, this thing makes the not too great MIJ Zoomatic knock-offs look like fine German engineering.
I'm definitely going to have to find some type of replacement strainer to get this drum up and running,
Here are the pics. The first one is the strainer on the drum (incomplete) and the next one is a pic I grabbed from an ebay auction to show the complete unit. Then front and back of the strainer, off the drum.