A Superb Bactrian Marble Challis, c. 3rd Mill. BC, the tapering base below a conical bowl, smooth patina, old encrustations, minor losses, intact 18 cm Provenance: From an Australian collection Reference: c.f. Bahn 1992: ...'The Bactrian Bronze Age...a culture, initially identified from...graves in northwestern Afghanistan ...that produced a range of materials (pottery, seals and other metal work, ornamented stone vessels, stone statuettes and other materials) which are strongly represented in Baluchistan and the margins of the Indus (Sibri), and also appear across the Iranian plateau as far west as Susa. V.I. Sarianidi's work on the Dashly sites and that of Askarov at Sapalli-Depe provide the archaeological context of this important culture area' Bahn P. (ed) 1992, Collins Dictionary of Archaeology, HarperCollins, Glasgow, p.44