Five punched symbols / Banker's mark. 13mmx14mm, 3.14 grams. Pataliputra mint. Mitchiner ACW 4197-4199; Gupta/Hardaker ISPC VI IV F 146 (#575)The Mauryan Empire was India's first great unified empire. It lasted from 321 to 185 BCE, and was ruled by the Mauryan dynasty. At its height it ruled virtually all of northern and central India and parts of Afghanistan and Pakistan.