Any coin with a "genuine" minting flaw would have some value, above the usual, as a collectible coin. Genuinely flawed coins are not necessarily known about or documented until somebody turns up with one, since they are an "accident" of the minting process, and have escaped detection during quality control at the mint therefore, a valuation cannot be anticipated. A reputable coin dealer should be able to identify and confirm the coin as genuine and make a valuation. Flaws and errors on coins should not be confused with mutilation or mangling of the coin. It should be noted that many people have the interest, skill and enthusiasm to fraudulently alter otherwise normal coins for the purpose of personal gain or notoriety. Also, many coins are commercially produced for magic or trick purposes and these include "double headers/tails" and "impossible" coins like a US silver Dollar on one side and a British copper Penny on the other.
Zero. No Eire (Irish) 10 Pence coin has ever contained any silver, they are made from a copper-nickel alloy.
All Eire (Irish) 50 Pence coins were made from a copper-nickel alloy.
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.
No. All general circulation Irish "silver" coins are made from a copper nickel alloy. If they were made from real silver, they would be worth a few pounds rather than a few pence.
Silver and copper alloy. A sixpence was a silver coin equal in value to six pennies, or pence. Under the British pre-decimal pound/shilling/pence (£sd) system, a pound was valued at 240 pence. One pound was equal to 20 shillings and a shilling was equal to 12 pence. Up to the reign of George V, all silver coins had a silver content of 92.5% silver and 7.5% copper, called sterling silver, which was the standard set by Henry II. In 1920, during the reign of George V, the silver content of all British silver coins was reduced to 50%.
Some coins do have copper in them, depending on the country and denomination. For example, the United States penny is made mostly of copper. However, some modern coins use other metals like nickel, zinc, or aluminum instead of copper.
None. It's made of copper-nickel. Silver was removed from circulating British coins in 1947, long before decimalisation.
There is no silver content in any general circulation British coin from 1947 onwards. The 10 Pence coin is made from 75% copper and 25% nickel.
The last circulating silver coins in England were struck in the 1946. Since then any silver-colored coins, including your 10p piece, have been made of copper-nickel.
Zero silver content. All general circulation Irish "silver" coins minted since 1951 have been made from a copper-nickel alloy.
The Pilgrims used a variety of currencies for trade, including English coins such as shillings, pence, and pounds. They also conducted barter trade with Native Americans before creating their own form of currency known as the New England shilling.
Well, since 1992 all Great Britain 2 Pence coins have been made of copper-plated steel. This is a very thin layer of copper and harsh/vigorous polishing (especially with abrasive powders) can easily remove this coating. I gently polished a 2 pence piece with a soft cloth and it did not become silvery but remained that rosy color of new copper.