Yes, I said "EX Series", not "X Series".
One of the same folks who identified the German DT-420 also owns an "EX Series" Destroyer.
At first glance, I was convinced someone had bolted an EX Series guitar neck on to a Destroyer body.
As it turns out, there actually was an EX Series Destroyer, model DT-320, again made exclusively for the German market and - we think - manufactured in the 1993 timeframe.
The body has a black finish and the neck is unfinished.
Unfortunately, that is about the extent of what we think we know about this rare guitar.
Update - 25 Jul 2010: the proper model designation for this is MED-320, not DT-320, and I have no idea why.
Update - 13 Aug 2010: I finally landed one with the help of several friends in Europe. It has a bolt-on neck and there is a sticker on the neck butt just outside the pocket that states, "MED320-BK". It has no-name machineheads and pups. The back covers of the machineheads and the ground plates of the pups are blank. It does, however, have an Edge double locking trem unit and, if I'm interpreting the serial number correctly, it was manufactured in Korea (not Japan) in Oct 1993.