I'm super curious about this piece, which I haven't been able to find out anything about, unfortunately. The problem is that the only markings (a backstamp of "030" and printed "GERMANY" in a half-circle, with a circle stamp) pull up a gazillion unrelated items. It's a small decorative plate (or oyster plate?) 5.5" edge to edge and about 1.25" deep like a dish or bowl. It has this really intricate sort of gold overstamp pattern like maybe it once looked like something else and the gold wore off. I'm not sure what that effect is even called, with like light gold veining or patterning over ceramic or china like that. There's probably a name for it? Thanks in advance!!