This is a fragment of a left shoulder of a king wearing the jubilee cloak. The cloak is open and off the shoulder. The head of the crook is in relief but broken. Also, there is the bottom edge of a wesekh collar. This fragment may go with 16-4-18a.1.
From Nubia (Sudan) Gebel Barkal, 700D. 1916: excavated by the Harvard University-Museum of Fine Arts Expedition; assigned to the MFA by the government of Sudan.
Harvard University—Boston Museum of Fine Arts Expedition