Stone cosmetic vessels in the form of or decorated with pigs are known from the Predynastic Period (Petrie Museum UC15752 - UC15754). However the resemblance of the above sow to faience amulets produced from the Third Intermediate Period onwards would suggest a later date. Cf. C. Andrews, Amulets of Ancient Egypt, London, 1994, p. 35, no. 32a for a similar amulet of a sow.