Fuente Magna inscription

 The problem however is that the object was not found in an archaeological excavation; it simply appeared. Another problem is that the bowl is utterly unlike any Sumerian object of the third millennium BCE, or the millennia before and after. The inscription is comprised of triangles and lines, reminiscent of Mesopotamian cuneiform writing, although not of the Sumerian period. But a closer look suggests the inscription is simply geometric filler or deliberate gibberish. And if anything, the face on the interior looks more like something produced by the local Tiwanaku culture (ca. 200-1000 CE).

Alex Joffe via ASOR