1999 $10 Fine Silver Coins of the Snowy Mountains Scheme, 1999 marks the 50th Anniversary of the beginning of the Scheme's construction. 'The tunnel is construction' and 'Alpine Lake' represented on these frosted uncirculated fine silver coins are a tribute to the efforts of those whose contributions have resulted in the creation and continuing operation of this modern engineering wonder. Limited mintage of 20,000. Certificate of Authenticity included with this set numbered 5332. Diameter 34.00 mm, Weight 20.77 grams. Please contact Adelaide Exchange Jewellers to find out more on this item.