Tan Flint, marked '12-12-26' and 'G2383' and '6(?) of 6(?)' The final number 6 seems to be written over a 7.
From Egypt, Giza, G 2383. 1913: Excavated by the Harvard University–Boston Museum of Fine Arts Expedition; assigned to the MFA by the government of Egypt.
Harvard University—Boston Museum of Fine Arts Expedition