The British Sixpence was known as a "Tanner". The Australian Sixpence was known as a "Zack".
A zac is Australian slang for a sixpence, before Australian decimalization in 1966.
The Australian Sixpence was first minted in 1910 and last minted in 1963. Australian Sixpences were not minted in 1913, 1915, 1929, 1930 to 1933, 1937, 1947 and 1949.
The 1910 Australian Sixpence is not sufficiently valuable to go to the trouble of forging however, nothing is impossible. The 1910 Sixpence should look exactly like the 1910 coin in the related link below.
Good luck if you have one, but the last British Sixpence was minted in 1967.
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.
The 1951 British Crown is 38.5 mm in diameter.
The first Australian coins to be put into circulation were the Threepence, Sixpence, Shilling and Florin in 1910.
Crown Australian Poker Championship was created in 1998.
30 penniesNote:Half a crown is two shilling and a sixpence.A shilling is 12 pennies.A sixpence is 6 pennies.
Nobody was Crowned in 1928 and Australian Sixpences were never issued as commemoratives.
A Crown was equal to Five Shillings. A Sixpence was equal to half a Shilling. There were 10 Sixpences in a Crown.