Israelite swords are depicted as
curved both in a bulla from Jerusalem and Assyrian reliefs at Lachish. (Aaron
J. Koller, The Semantic Field of Cutting Tools in Biblical Hebrew: The
Interface of Philological, Semantic, and Archaeological Evidence [The
Catholic Biblical Quarterly Monograph 49; The Catholic Biblical Association of
America, 2013; repr., Eugene, Oreg.: Wipf and Stock, 2023], 189)
The following image comes from ibid., 190:

For a good essay on this bulla, see:
Nahman Avigad, “The ‘Governor of the City’ Bulla,” in Ancient
Jerusalem Revealed, ed. Hillel Geva (Jerusalem: Israel Exploration Society,
1994), 138-40.