With the possible exception of traders tokens (with the traders business name on them), there were no "Australian" Sixpences minted prior to 1910. The only Sixpences circulating in Australia prior to 1910 were British Sixpences.
Australian coins minted for general circulation in 1931 were -Halfpenny - 369,000Penny - 494,000Threepence - not mintedSixpence - not mintedShilling - 1,000,000Florin (Two Shillings) - 3,129,000The Threepence, Sixpence, Shilling and Florin were all made from 92.5% silver in those days.
The British Sixpence was known as a "Tanner". The Australian Sixpence was known as a "Zack".
An Australian 1963 50% silver Sixpence (Elizabeth II), uncirculated and in absolute mint condition could fetch up to $6 AUD. If it has been circulated but still in good condition, it might fetch anything from $1.50 to $3 AUD. There were 25.056 million minted. An Australian 1963 50% silver Sixpence (Elizabeth II)(Proof), uncirculated and in absolute mint condition could fetch up to $160 AUD. There were 5,042 minted. The 1963 Sixpence was the last to be minted prior to the introduction of Decimal Currency. A reputable coin dealer will be able to give a more accurate valuation.
An Australian 1955 50% silver Sixpence (Elizabeth II), uncirculated and in absolute mint condition could fetch up to $40 AUD. If it has been circulated but still in good condition, it might fetch anything from $1.50 to $8 AUD. There were 14.248 million minted. An Australian 1955 50% silver Sixpence (Elizabeth II)(Proof), uncirculated and in absolute mint condition could fetch up to $365 AUD. There were 1,200 minted. A reputable coin dealer will be able to give a more accurate valuation.
An Australian 1960 50% silver Sixpence (Elizabeth II), uncirculated and in absolute mint condition could fetch up to $45 AUD. If it has been circulated but still in good condition, it might fetch anything from $1.50 to $8 AUD. There were 18.592 million minted. An Australian 1960 50% silver Sixpence (Elizabeth II)(Proof), uncirculated and in absolute mint condition could fetch up to $260 AUD. There were 1,509 minted. A reputable coin dealer will be able to give a more accurate valuation.
With the possible exception of traders tokens (with the traders business name on them), there were no "Australian" Sixpences minted prior to 1910. The only Sixpences circulating in Australia prior to 1910 were British Sixpences.
An Australian 1953 Sixpence, uncirculated and in absolute mint condition could fetch up to $400 AUD. If it has been circulated but still in good condition, it might fetch anything from $3 to $75 AUD. There were 1.152 million minted. An Australian 1953 Sixpence (Proof), uncirculated and in absolute mint condition could fetch up to $30,000 AUD. A reputable coin dealer will be able to give a more accurate valuation.
An Australian 1944 sterling silver Sixpence (KG VI)(minted in San Francisco - S), uncirculated and in absolute mint condition could fetch up to $42 AUD. If it has been circulated but still in good condition, it might fetch anything from $2.50 to $8 AUD. There were 4 million minted. A reputable coin dealer will be able to give a more accurate valuation.
With the possible exception of traders tokens (with the traders business name on them), there were no "Australian" Sixpences minted prior to 1910. The only Sixpences circulating in Australia prior to 1910 were British Sixpences.
A zac is Australian slang for a sixpence, before Australian decimalization in 1966.
The Australian Penny was issued in most years from 1911 to 1964 inclusive. Depending on their condition, the year they were minted, where they were minted, and any peculiarities of the coin, they could be worth anything from 50 cents to thousands of Dollars.