This is a fragment of a ring bezel. (cf. 26-1-608) It is inscribed with a cartouche of [mrj-jmn Hr-m-Hb] Horemheb.
From Egypt, Giza, Street G 7000, sand just above gebel. 1926: Excavated by the Harvard University–Museum of Fine Arts Expedition; assigned to the MFA by the government of Egypt.
Harvard University—Boston Museum of Fine Arts Expedition