1 Oz Ounce Perth Mint Kangaroo Minted 99.99% Silver Bullion Investment Bar. Silver investors can now acquire the precious metal of their choice in the form of 1oz Kangaroo Minted Silver Bars manufactured by the world-renowned Perth Mint. This silver bullion minted bar features a struck version of The Perth Mint’s LBMA registered mark on a table of radiating circles. Included on the front is the inscription 9999 FINE SILVER, which incorporates a tiny’P’ mintmark within the last nine. This authentication feature is designed to make it significantly more difficult for the bar to be counterfeited. Like Perth Mint gold minted bars, the back features kangaroo-shaped motifs incused on the back. Minimum Gross Weight: 31.107 g. Dimensions (mm): 47.60 x 27.60 x 3.