Australia-1913-14-A 3 Penny "Kangaroo" Official Postage Stamp With Double Perforation-Illustrated

Illustrated below is an example of the 3 Penny (olive) stamp issued for Australia in 1913-1914. The original method for identifying stamps used officially was by perforating the stamp with "OS". This example of the stamp shows the scarcer variety perforated "OS NSW" (official stamp New South Wales- a state in the Australian Commonwealth). The watermark (a large crown over "A") is shown below the stamp face illustration.