Australia, Canada & United Kingdom, Queen's Diamond Jubilee silver Proof set of three coins, 2012, comprising: United Kingdom, Proof silver 5 Pounds; Canada, Proof silver 20 Dollars, Australia, Proof silver 50 Cents, 28.28g, 31.39g, 18.24g (S. L24; KM 1177; N. 238312). Uncirculated Proofs, 4,000 sets were issued. In the box of issue, without certificate. A unique collaboration between three Royal Mints.