The Perth Mint recently released a new 1 oz silver bar. Really nice but I'm more in to coins :)
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.
Precious Metal Content (Troy oz) 1.000
Fineness (% purity) 99.99
Minimum Gross Weight (g) 31.107
Maximum Dimensions (mm) 47.60 x 27.60
Standard Thickness (mm) 3.000
http://www.perthmintbullion.com/Buy-Silver-Bars/1oz-Minted.aspx?size=18