This object appears to be a part of a rim of a vessel. The field number on the object is incorrect. It is not a shawabty fragment and it is not included under this number in the Object Register. See 19.1647.
From Nubia (Sudan), Gebel Barkal B 502 ?. 1920: excavated by the Harvard University–Boston Museum of Fine Arts Expedition; assigned to the MFA in the division of finds by the government of the Sudan.
Harvard University—Boston Museum of Fine Arts Expedition