British Halfpennies have been minted since about 1200 AD, so to keep it manageable, we will stick with Halfpennies you are more likely to see, from about 1800 onwards and not including Proof coins.
There are no rare or valuable British decimal Halfpennies.
The rarest and most valuable Halfpennies had only a few coins minted for that year and are mostly in museums or the collections of very wealthy collectors and are prohibitively expensive for the average person.
These include the -
1937 Edward VIII - bronze - not released to circulation
1924 George V - bronze - specimen finish - extremely rare - packaged
1883 Victoria - bronze - rose for brooch - extremely rare
1860 Victoria - copper - TB/BB mule - extremely rare
Many coins have more than one variant due to the fact that they were minted at different mints on slightly different dies. It is these, frequently minute variations that make the coin rare or valuable.
The following are Halfpennies that might fetch over £500 GBP if they are in mint uncirculated condition.
1878 Victoria - bronze - with wide date
1874 Victoria - bronze - with narrow date
1871 Victoria - bronze
1869 Victoria - bronze
1865/3 Victoria - bronze
1862 Victoria - bronze - die letter to the left of the lighthouse
1860 Victoria - copper - beaded borders
This list is not exhaustive and is only an indication of the most obvious higher value halfpennies.
If in doubt, a reputable coin dealer will be able to assist with identification give a valuation.
A British 1951 Penny would be the most valuable King George VI Penny. Uncirculated and in absolute mint condition could fetch up to £60 GBP. If it has been circulated but still in good condition, it might fetch anything up to £35 GBP.
There is also and "error" coin. A British 1946 Penny (ONE' die flaw), circulated but still in good condition, it might fetch anything up to £60 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
All years of issue of these coins are still potentially in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 2 Pence.
There is no British 2 Pence coin that could be considered either rare or valuable. They have only been around for 40 years.
Depending on the year, an uncirculated mint condition coin might fetch up to £0.30 GBP.
A Proof FDC coin in mint condition coin might fetch up to £1 GBP.
Some of the 1983 2 Pence coins had the word "NEW" included on them accidentally due to a die mix up, but these were only ever released in Mint sets.
The UK Royal Mint. Issues "Proof" coins that have been very carefully struck with fine attention to detail and are also uncirculated. these are often sold as part of a set (for the year) and are of a higher value.
They also produce sterling silver £2 coins (and others) which again have a higher value. £2 silver coins typically have gold plating for the outer rim. currently £30
Piedfort (peed for) coins are proof coins made from silver, but are double thickness (and double weight) therefore they are twice the value of the normal silver ones and are much prized by collectors. Curently up to £140 new.
Of course they also make Gold 22carat proof £2 coins (currently £700)
I haven't seen a double thickness gold Piedfort £2 coin, but if they did it would likely be around £1,500
As for normal circulated coins, there aren't any rare ones particularly. Some designs may be worth a couple of pounds extra to someone collecting a set, but generally only a few pounds unless sealed proof coins from the mint as above.
The most valuable British Farthing issued during the 20th century would probably be the 1915 coin. There are two versions of the 1915 Farthing. One has wider spacing between the two T's of BRITT, the other has close spacing. It is the coin with the close spacing that has the value.
Another valuable Farthing would be the 1895 Farthing showing the laureate bust of Queen Victoria, not the 1895 Farthing with the old veiled bust.
Yes. The British 20 Pence coin was first issued in 1982 and have been minted in most years since, in annual quantities ranging from 31 million to 740 million.
It would depend on the country, but the British Shilling was replaced by the 5 New Pence coin in 1968. The Shillings of most other British Commonwealth countries was replaced by the 10 cent coin.
It could be any 50 cent or 50 Pence coin issued since 1953 by any of the 50 plus Commonwealth countries. If the coin has no country name on it, it is most likely a British 50 Pence coin issued between 1969 and now.
The only British 2 Pence coins minted in 1983 were minted for either Mint Uncirculated or Proof coin sets. A total of 631,000 British 2 Pence coins were minted for the Mint Uncirculated coin sets. The "Mule" (2 New Pence instead of Two Pence) coins were included in sets packed by the Royal Mint for the "Martini and Heinz presentation sets", and not all sets included the "Mule" 2 Pence coin. No "Mule" coins were included in any of the Royal Mint sets. Nobody has ventured a specific quantity of coins that were minted, but rather the vague "some" or "a quantity". For want of a better answer, a number very significantly less than 631,000 of the 1983 "mule" 2 New Pence coins were minted.
After the abolition of the Guilder, the new most valuable coin would be the 2 Euro coin
The British 2008 "dateless" 20 Pence coin may be worth Fifty Pounds, some people think it may be worth more. Some 'Proof piedfort in silver FDC" 20 Pence coins might get up to Fifty Pounds, but then, they cost a lot to buy in the first place. Most British 20 Pence coins are worth 20 Pence.
For reasons known only to the Royal Mint, there was only one 1952 British Halfcrown coin minted.
They are neither rare nor valuable. Most coin dealers would be able to sell you a 1952 British Halfpenny.
As a general "rule of thumb", most, if not all predecimal British coins would have some value beyond face value, if only for the metal they are made from. As another general "rule of thumb", most British decimal coins will have only face value other than for "uncirculated" or "Proof" coins and the very occasional error coin such as the undated 20 Pence coin and the 1983 2 New Pence coin.
Ram darbar coin
The most valuable coin in the world is the Flowing Hair Dollar. This coin was minted in 1794. This coin last sold in 2013 for just over ten million dollars.
No. They would be worth far more than 10 pence if they were made from Silver. The British 10 Pence coins are made from 75% copper and 25% nickel. No circulating British coin has any silver content.