Australia has never produced a Farthing coin. Any Farthings that may have been circulating in Australia would have been British Farthings.
There was no 1946 British Crown minted.
Modified coins have no collector value.
The best known low value coin is the "Farthing" (fourthing), one quarter of penny.Great Britain also produced "Half-Farthings", "Third-Farthings" and "Quarter-Farthings", mostly for circulation in the Colonies.The Quarter-Farthing was only ever minted during the reign of Queen Victoria and then only for the colony of Ceylon. It was the smallest denomination ever minted by the Royal Mint.The Half-Farthing British coin was produced in various years between 1828 and 1856 (although proof coins were anomalously produced in 1868). The coin was initially produced in 1828 for use in Ceylon, and again in 1830.The Third-Farthing was produced in various years between 1827 and 1913.The coin was produced in 1827 exclusively for use in Malta, but it is considered to be part of the British coinage as at that time Malta was considered more as a part of Britain than in the twentieth century.
The Halfcrown is a silver coin. If you have a gold coin it is because somebody plated it. Modified coins have no collector value.
British Masters was created in 1946.
British Coal was created in 1946.
The die flaw on the British 1946 Penny is a small mark after the ONE on the reverse (ONE').
See the related questions link below.
the dime in 1946 was worth $1.40
British Aviation Services was created in 1946.
British Car Auctions was created in 1946.