mid- to late 13th Dynasty, from Neferhotep I onward(C7/D-type heads)
Bibliography:
examined in the museum [cp (base and back)]; Drioton MSS, 5381, 25A [bp (base, back)]; Steindorff 1936, no. 7 [bp (base)]; G. T. Martin 1971, no. 1741, pl. 23 (36) [s (base)]