There were two different versions of this medal struck, by two different mints. This version of the medal is listed in the Carlisle catalogue of Australian medals, number 1970/54. Struck by Amor in gilded bronze, mintage 51,703 - which is fairly high for a modern Australian medal. There are minor design differences between this medal and the gold one listed above (which is C# 1970/53), most notably the "MG" mintmark below the pope's shoulder; the gold one has it, the base-metal one does not.
The 2008 price guide supplement lists C#1970/54 at $5 in VF to EF condition.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis