In this short article the author and Maurizio Cattani in the volume devoted to the joint Italian/Russian/Turkmenian activities in south Turkmenistan entitled Archaeological Map of the Murghab delta are dealing with a preliminary analysis of the chronological sequence of the pottery production collected and organized form the field survey conducted from 1989 to 1994 there. The already known and traditional sequence of Yaz I-III and defined as such by the soviet archaeologists, is by the authors enlarged with a post Yaz III horizon, which is crossing, most probably, the Achaemenid and post-Achaemenid period.