1oz Australian Koala silver bullion coins 2007 to 2011 Nice looking silver bullion coins but I would stay away from government issued "legal tender" with a "face value." You pay high premiums and the government owns them, you just hold them. .Numis Network Presents an entertaining and educational video about the 2011 Australian Silver Koala coin.Who can resist the endearing and loveable Australian Koala? With a design that changes yearly, it is easy to understand why the Silver Koala is a favorite of collectors, both young and old alike. 2011 finds two cuddly koalas sitting on adjacent tree branches. Exquisitely frosted, the delicate design on the table of this year's coin enhances the koala's shiny likeness.I prefer the 2010 Koala. I chose not to buy the 2011 1 kg or 1 oz coins.