If you are looking for a coin, this one is probably one of several coins that I have that is pretty old. There are other mediums other than metal that were used, like cowry shells...
Ionia, Erythrai: Anonymous (550-500 BCE) EL Hekte (SNG Kayhan 737–8; SNG von Aulock 1942; Boston MFA 1806–7)
Obv: Head of Herakles left, wearing lion skin
Rev: Quadripartite incuse square; two quarters partially filled-in
Ionia, Kolophon: Anonymous (ca. 530-500 BCE) AR Twelfth Stater (Kim & Kroll p. 73; SNG Kayhan 342; SNG von Aulock 1808–9; SNG Berry 1039)
Obv: Archaic head left
Rev: Rough incuse square
I am certain I have some around 600-500 BCE, but I have tons of coins that haven't been photographed yet. Takes an immense amount of time
Kalinga: Anonymous (ca. 500-400 BC) AR ½ Karshapana
Obv: Tree, 7-annulet pattern, 4-arm symbol, and elephant facing right
Rev: Blank
A gallery of my coins and artifacts can been seen on
FORVM Ancient Coins