Six fragments. Five with flat surface as part of throne or base. One with smooth curved surface.
From Giza, G5412 debris in room. 1914: 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
Egyptian, Old Kingdom, Dynasty 4, reign of Khafra, 2520–2494 B.C.