American "nickle" $.05 coins are actually mainly copper in alloy. However, Canadian $.05 nickle coins, as well as the larger denomination Canadian coinage of more recent years, are in fact quite high in nickle content, which is why a magnet inside of vending machines will catch every one, and not allow those of us in the states to buy a
cheap soda when the exchange was running far in favor of a strong USD.
A study of the Coinage Act of 1857, will reveal of course that Congress passed legislation repealing the acceptance of circulating foreign currency as legal tender in the United States. A fact that is largely overlooked, is that the mints actually accepted devalued foreign silver coinage for a period, at full value. They were able to do this at a profit, as the silver was bought and paid from the money created by the introduction of the small Flying Eagle cent, introduced to circulation in 1857. These were the first coins to contain less than full metal content value, to support the coin value. The "Shield Nickle" design introduced in 1866, was in fact 75% copper, and 25% nickle, weighing in at 5 grams. We may note that the earlier American one cent coinage, the Large Cent, minted from almost pure copper, contained full metal value nearly equal with the coins face value. These Large Cents weighed in at better than 10 grams and this was just about a penny's worth of copper at the time. The small percentage of nickle (slightly over a gram in weight) in the base metal five cent coinage introduced in 1866, and having less than half the total weight in copper of the lesser one cent coin only a few years earlier, is surely not equal to $.05 in metal value at that time! The market value of nickle during the later 19th Century was less than silver, which accounts in part for the rapid popularity of shiny nickle plating soon replacing silver plating in so many areas of manufacturing. The silver three cent coin was also implemented with a lesser value nickle three cent piece in 1865, and although they both continued to be minted and circulate concurrently for several years, the silver example soon disappeared from circulation. These smallest of U.S. minted silver coins are very rarely found at sites dating after the American Civil War. Having dug several of both the silver three cent and nickle three cent coins over the years, has provided a few additional clues to time frame of usage.
CC Hunter