The article examines the complex of 35 ceramic stamps found in the well under the pottery kiln. Previously it was assumed that the filling of the well and the beginning of the ceramic industry in Chersonesos are synchronous. However, the author came to the conclusion that these squeezes have no relation to the workshop, and the well was filled either at the end of the 60s, or in early 50s of the 4th century BC, i.e. long before the appearance on this place of Chersonesos’ "Ceramics".