Well, it's not of German origin ... the mark is a tough one as I did not find it while flipping through my books. I *know* that I have seen it before, as far as I can remember that was on the US eBay PGP board, ages ago. What I do remember was that the material was not porcelain (as in 'bone china') but fine stoneware and the mark was from outside Central Europe ...
Not much, I know. Sorry.