Got it right before me, typing this on it, actually. It's a German layout G80-2550HPD/02 with black switches. After a few test runs, it's firmly established that it sends out unique keycodes for 24 function keys and a number of special keys, which register in KeyMapper as Unknown, but are remappable nonetheless. The layout itself needs a bit of adjustment (for example, Home is in the middle of the cursor keys, and Escape is on the number pad) but the benefits are great. Types like you'd expect from a straight out of factory Cherry. I'll stay with it, and stock up in case of failure.
Point of note: These keyboards have old style double injection keys. They'll survive a LOT.