Toning to medals. Only 150 of each made, each sterling silver, 33 grams, 32mm across. Issued at the N.A.A. Coin Fair 21-22 November 1992. Come with certificates & boxed. Same number on each certificate. 1 - 1992 Roal Visit & Town Hall(other side). 2 - 1932-92 Sydney Harbour Bridge. 3 - Sydney Town Hall. 4 - Sydney Harbour Tunnel. Designed by Ross Pratley & manufactured by Amor-Sanders P/L. Auction in AU$. Post $8 within Australia, $25 post outside Australia. MANY MORE COINS IN MY EBAY STORE.