silver on the outside/ small gold coin inside
Yes they do. No British decimal general circulation coin has any silver content at all. The "silver" coins of all Commonwealth countries similarly have no silver content.
Yes ,they certaintly are.
It is 90.3% silver and has .7859 troy ounces of silver. However, 1910-1914 Mexican pesos are collector coins with values that exceed bullion prices for all but the most worn examples. While they have less than $20 worth of silver in them, even worn coins can be worth $50 on eBay and values jump into the hundreds of dollars for better grade coins.
All New Zealand silver coins from 1933 to 1946 had a silver content of 50%. From 1947 onwards, all New Zealand "silver" coins were made from a copper-nickel alloy.
Coins struck for circulation in the US today have no silver in them.
No, the majority of them are genuine coins. Until 1967 the Mexican peso was partially silver (though, in 1967 it was only 10% silver) and all the peso coins dated 1967 and earlier contain some silver. Since a lot of them were made, most are not replicas and they are genuine coins. Since many of them were made and they aren't considered to be very attractive and rare coins, they are usually sold for little more than their silver content. Though there are a few replica pesos, the vast majority of them are genuine.
There have been six King Georges from 1714 to 1952. 1919 and 1920 were the two years when the British silver coinage was debased from 0.9250 to 0.5000 silver. Which year the change was made depends on the denomination of the coin. Prior to 1919/1920, all British "silver" coins had a 92.5% silver content. From 1919/1920 to 1946, all British "silver" coins had a 50% silver content. From 1947 to present, all circulating British "silver" coins had a 0% silver content.
0.3856 troy ounces of silver
None.
1837 was the year US silver coins changed to .900 silver & .100 copper, that caused a slight reduction of silver.
1930 50 centavos
Jewelers and coin dealers buy gold and silver.