The sheath is entirely decorated at its drop-shaped tip with spirals, rosettes, and rhombic appliqués. The upper part displays arabesque leaves and tendrils and the buckle as well as lower tip is decorated with rhombic and rosette-shaped appliqués. The back of the upper part is blank. Thuma daggers were produced only for the Zaydi Muslim elite. They were very precious, and kept in families for generations.
On the back of the sheath is an Arabic stamp with the name of the ruler and a date: al-Mansur 115x. The stamp belongs to Imam al-Mansur al-Husayn, who lived from AH 1139 to 1161 (AD 1775-1809).
An engraved inscription in Hebrew names the silversmith: H(arun) Kasil. It is possible that H(arun) Kasil was the same Kasil who lived also under al-Mahdi al-"Abbas, see Walters 57.2319.