Assyrian sword from 1310-1280 B.C. fits the description of a "scimetar."
Bronze Assyrian (“sickle”) sword, ca. 1310-1280 B.C, Paul Y. Hoskisson, “Scimitars, Cimeters! We Have Scimitars! Do We Have Another Cimeter?,” in Warfare in the Book of Mormon, ed. Stephen D. Ricks and William J. Hamblin (Provo, UT: Foundation for Ancient Research and Mormon Studies; Salt Lake City: Deseret Book, 1990), 354
Figure 1. Top sketch is of an Egyptian sword of the XXIII Dynasty, 893-870 B.C., in the Mesopotamian Museum, New York, Bottom sketch is of a bronze Assyrian (“sickle”) sword, ca. 1310-1280 B.C.