Faience Sphinx of Amenhotep III, New Kingdom, Dynasty 18, ca. 1390–1352 B.C. at The MET
This is considered an offering table, but on closer inspection it's machined to perfection and includes hieroglyphs and other information. To date, no electromagnetic test or scans have been done on this piece which comes from (or was thought to be from) 2350 BC, 5th Dynasty (Old Kingdom) Egypt.