The earliest known image of the Buddha with approximate indications on date is the Bimaran casket, which has been found buried with coins of the Indo-Scythian king Azes II (or possibly Azes I), indicating a 30-10 BCE date, although this date is not undisputed.
The Casket | Glass Casket | Franks Casket | The "Kanishka casket", dated to 127 | Kanishka casket | Bimaran casket | Batesville Casket Company |