EL Myshemihekte (1/24 Stater) ND struck 670-45BC Unknown Mint Ionia/ uncertain City State Obv: unknown design Rev: Incuse Square Punch 0.67g. 6mm. .600 Cf. SNG Kayhan 1-678
Tiny little gold BB! Is that your oldest now? Coins don't get a whole lot older than that. You've got something from the very dawn of coinage, there.