Blegen dates to MH in his Class III of Matt Painted Sherds. Bichrome pottery is (Mathioudaki 2014, Kramer 2004) a hallmark of the end of MH and LH I. in Absence of context it cannot be dated more precisely.
Blegen dates this sherd MH based on MM III parallels. Redated here to LH I since it is clearly Mycenaean decorated. The unfilled circle motif according to Furumark 1941 fig. 57, only occurs in LH I, giving this as our date.
LH I. LH I or LH IIA based on shape and motif, Furumark 1941, Mycenaean Pottery, pp. 48, 353, 358, 621. 396–397. LH I based on excavator's reported context (Blegen 1928, Zyrougies, p. 135–136, fig 128.2.)
LH I. LH I or LH IIA based on shape and motif, Furumark 1941, Mycenaean Pottery, pp. 48, 353, 358, 621. 396–397. LH I based on excavator's reported context (Blegen 1928, Zyrougies, p. 135–136, fig 128.3.)
based on FM similarity to nos. 4 and 13 (Furumark 1941, Mycenaean Pottery, p. 327, fig 55) and direct comparanda for the motif to this date (NM Inv. 6747, Mountjoy 1999, Regionaly Mycenaean Decorated Pottery, pp. 93–94, fig. 15.55).