That would be the 1916-D with a mintage of 264,000. However, the 1941/1942 overstrike error with an unknown mintage is also in demand by collectors. More information can be found at this website : http://coins.about.com/od/coinvalues/qt/mercury_keys.htm
A 1943 dime made of mercury is not rare. It is actually an error coin as dimes were made of silver that year. An authentic 1943 mercury dime would be valuable due to the mistake in using the wrong metal. You should consult with a professional coin collector or numismatist to authenticate the coin's rarity and value.
Do a Google image search for "Mercury Dime" and you will see the photo of the dime.
The 1894-S dime is considered the rarest Mercury dime, with only 24 known to exist. This coin is highly sought after by collectors and can fetch a high price at auctions.
The 1916-D Mercury dime is 1.35mm thick and has a diameter of 17.9mm.
One way is to compare it to a picture of a Mercury dime. Another way is to simply check the date on it. If it's dated anywhere from 1916 to 1945, it's a Mercury.
a 1936 dime is called a mercury dime. they aren't rare so they are worth around a dollar
a 1917 us dime is called a mercury dime. its not that rare so it is worth about a dollar
1942 is a very common date Mercury dime most are worth about a dollar just for the silver. But it could be worth something since that was around/during WWII.
The Winged Liberty, or Mercury Dime. Most people call it the Mercury Dime, but its real name is the Winged Liberty dime.
1944 is a common date for Mercury dimes and there are no significant varieties.
I' guessing old dates such as 1744 or 1600 or older.
A 1943 dime made of mercury is not rare. It is actually an error coin as dimes were made of silver that year. An authentic 1943 mercury dime would be valuable due to the mistake in using the wrong metal. You should consult with a professional coin collector or numismatist to authenticate the coin's rarity and value.
7-2-11>>> The last Mercury dime was struck in 1945. A 1958 dime is a Roosevelt dime (1946 to date) and is common, most are only valued for the silver, about $2.00
Roosevelt appered on the dime for the first time in 1946. The 1937-D Mercury Dime is not rare and most show heavy wear and are valued at $2.00-$9.00
If it's a U.S. dime with a date of 1944, it's a Mercury dime.
The 1916-D, which is worth $375.00.
The first MERCURY dime was struck in 1916