Ancient Islamic scales made of brass, also known as "Steelyard" scales. Structure and design: The scales feature a long arm with a moving weight, a top hanging hook, and a tray suspended by chains. Historical uses: This type of scale was traditionally used by ancient pharmacists (apothecaries) to weigh delicate substances. Provenance: Similar items often date to the 19th century or the Ottoman Empire, and may have originated in the Levant.