A British 1840 Sixpence, uncirculated and in absolute mint condition could fetch up to £225 GBP. If it has been circulated but still in good condition, it might fetch anything from £10 to £80 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
NOTE - The reverse of these coins is upside down to the obverse. This is normal.
The Sixpence was not introduced into the currency until about 1550.
Sixpence GBP in 1865 had the purchasing power of about £1.62 GBP today. NOTE - This historical conversion is the result of many calculations and considerations by a purpose designed program for which I can take no credit. The resulting answer should only be regarded as an approximation.
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.
The British Sixpence was known as a "Tanner". The Australian Sixpence was known as a "Zack".
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.
Good luck if you have one, but the last British Sixpence was minted in 1967.
A Sixpence was a small silver coin used in many countries of the British Empire that was the equivalent in value to 6 pennies, hence the name. Sixpence is also how you would refer to the combined value of 6 pennies. If you had 6 pennies, or 3 pennies and a Threepence in your pocket, you could say that you had sixpence in your pocket.
GRI (not "GRJ") on the reverse of the 1937 to 1946 British Sixpence is an abbreviation for George Rex Imperator.