This paper reports the results of an attempt to define the geographical range and a limited number of characteristics of a fourth millennium B.C. administrative system through chemical characterization of its primary administrative tool - sealing clays. The focus of this study is sealings from levels XII to VIII at Tepe Gawra and from three possible economic or political partners of Gawra - contemporary of Nineveh and Arpachiyah, and later Tell Brak. The technique used is instrumental neutron activation analysis (hereafter INAA). This analysis complements a series of other studies of seals and sealings and other artifacts from fourth millinium B.C. Tepe Gawra.