A British 1947 cupro-nickel Sixpence (George VI), uncirculated and in absolute mint condition could fetch up to £6 GBP. If it has been circulated, not much.
The values quoted are the best possible for the best specimens in their grades, but may be significantly lower due to varying demand for the coin and the prevailing economic climate. A reputable coin dealer will be able to give a more accurate valuation based on inspection of the coin.
The only British Five Pound coin issued during the reign of King George VI was in 1937.
1947 is a common year for British pennies and it is worth about 25p ($.35 or so US/Canadian) if circulated. And about 3-4 pounds if uncirculated (about $5-6 US/Canadian)
The Sixpence was not introduced into the currency until about 1550.
All British "silver" coins from 1947 onwards were made from a copper nickel alloy.
Probably nothing. Modified coins have no collector value.
A Sixpence was a small predecimal British coin. Half a Sixpence was a Threepence, an even smaller predecimal British coin.
All British 1935 Sixpences were minted at the Royal Mint London. There are no "D" Sixpences.
A British 1700 Sixpence, circulated but still in good condition, might fetch anything up to £1,350 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Halfcrown is the eqivalent of Two Shillings and Sixpence. A Crown was Five Shillings.
The Royal Mint did not produce any Sixpences from 1752 to 1756 inclusive.
The British Sixpence was known as a "Tanner". The Australian Sixpence was known as a "Zack".
The British Sixpence - from 1953 to 1967 weighs 2.83 grams from 1947 to 1952 weighs 2.83 grams from 1937 to 1946 weighs 2.827 grams from 1920 to 1936 weighs 2.876 grams from 1838 to 1920 weighs 3.01 grams from 1816 to 1837 weighs 2.827 grams
Good luck if you have one, but the last British Sixpence was minted in 1967.
The British Sixpence has never been issued as a bronze coin. The British Sixpence was first issued around 1551 and has been made from silver of varying quality until 1947. From 1817 to 1920 it was made from sterling silver. From 1920 to 1946 it was made from 50% silver and, from 1947 until its last minting in 1967, it was made from a copper nickel alloy. Depending on where and how the coin has been stored, a discolouration may have developed on the coin giving it a dirty gold, or perhaps a brownish colour.