Pictures of a specific coin are difficult to come by. Usually you should be able to find one on eBay, but the picture is withdrawn after the coin is sold.
The 1950 British Halfcrown was struck in a copper nickel alloy. If you have a gold Halfcrown coin, it would be because somebody has gold plated it, perhaps to commemorate the birth of a baby in the family, or some other significant family occasion. Modified coins have no collector value.
There was no 1805 British Halfcrown minted.
The last British Halfcrown was minted in 1970.
The last British Halfcrown was minted in 1970.
There were no British Halfcrown coins minted from 1752 to 1815 inclusive.
There were no British Halfcrown coins minted from 1865 to 1873 inclusive.
Such a coin does not exist. The last British Halfcrown coin minted for circulation was minted in 1967. The last British Halfcrown Proof coin was minted in 1970.
There were 1,710,946 1892 British Halfcrown coins minted.
Such a coin does not exist. Australia has never issued a Halfcrown coin.
British 1913 Halfcrown coins were minted in 92.55% silver only
The crowned interlocking "G"s on either side of the shield are described as a monogram and appear on all George VI Halfcrown coins. The "G" represents his initial.
Since the Recoinage Act of 1816, the British Halfcrown has varied from 14.1 to 14.2 grams. The British 1921 50% silver Halfcrown weighed 14.14 grams.