I found this in the cellar of my parents estate. At first I thought it might be Limoges. Unfortunately, it had been cracked in two and badly mended with some kind of hideous dark brown glue. I soaked it in water overnight and tried to scrub the old glue off, with not much success, especially on the back. I re-glued it, but the crack goes right through the faint mark. I think it says Wallendam Austria with the picture of some castle or building. I couldn't find anything about Wallendam pottery, but I may be reading it incorrectly. Anyone recognize the backstamp?