US dimes, quarters and half dollars dated 1964 and before contain 90% silver. Half Dollars from 1965 to 1970 contain 40% silver. The 1942 - 1945 nickels have 35% silver. Silver dollars dated 1935 and before have 90% silver.
The US Mint did not issue any silver coins of any kind in 1980. If you have silver coins dated 1980, they are not US coins.
The Balboa is the same as the US dollar. We know that US silver dollars is worth more as the Panama silver Palboa. In Panama the currency is US but there are Balboa dollar coins. Also, the silver coins in Panama are the same size as the US coins and would be worth more as the US silver coins.
A 1985 proof contains no silver coins.
Coins struck for circulation in the US today have no silver in them.
Each denomination of US silver coins has different amounts of silver, so it's not possible to answer this question. Be more specific and post new question with the dates of the coins.
There were no US silver dollrs minted in 1955, however, most US silver coins which were minted for circulation contained 90% silver and 10% coper.
The amount of pure silver in the 1922 Peace dollar is .77344oz, all US silver one dollar coins from 1840 to 1935 have this much silver in them.
The amount of pure silver in the 1925 Peace dollar is .77344oz, all US silver one dollar coins from 1840 to 1935 have this much silver in them
Sorry, the US never struck any silver 1 cent coins of any date.
The US has never made any silver 1 cent coins.
1837 was the year US silver coins changed to .900 silver & .100 copper, that caused a slight reduction of silver.
it is illegal in Mexico to take coins to other countries