2013 $1 Silver Proof Coin, Holey Dollar and Dump Set. In the early 19th century, the growing free population of the colony of New South Wales demanded a unified currency to support its fledgling economy. The Holey Dollar and Dump circulated until the Sterling standard was imposed in 1829. Certificate of Authenticity is included with this coin numbered 3314. Mintage 12,500. Please contact Adelaide Exchange Jewellers to find out more on this item.