Archive File This tread will make easy for collectors to identify theirs collection and make easy for search. Please do not comment here. Medal - The Perth Mint Centenary Event Medal Commemorative issue 100 years of The Perth Mint Original issued with black case & capsuled and cert. Year issued 1999 Mintage 5000 Weight 31.635 g Diameter 40.6 mm Thickness 4 mm Metal 999 silver Picture of the Perth Mint main building. (reverse) Designer: George Temple Poole Similar to this they do come in metallic. source: https://en.numista.com/catalogue/exonumia303960.html