2011 $1 Silver Proof Coin, Ram's Head Dollar. Before the introduction of decimal currency, the sheaves of wheat illustrated on the three pence and the Merino ram on the shilling expressed Australia's pastoral spirit. These images remind us of the historical and economic significance of our primary industries. Certificate of Authenticity is included with this coin numbered 2674. Mintage 12,500. Please contact Adelaide Exchange Jewellers to find out more on this item.