Punch-Marked Coin, Vangha Janapada(600 BC),Copper Karshapana,Obv:three symbols including a wheel, a six-armed symbol and a boat representing riverine trade in bengal,Rev:conch shell (shank) single punch,2.81g, 14.47mm,(Raj. Series-4 # P.30, No. 30),about very fine,Rare.