More than what? If you're comparing it to a 1964 coin without a mint mark, then no, it's not more valuable.
They're currently at least worth about $2 for the silver content. Some are worth more than that, depending on date, mint mark, and condition.
5 cents each. They're old but not rare. 1964 had mintage numbers of more than a billion.
U.S. quarters minted in 1964 and earlier contain 90% silver and are currently worth at least $6 in melt value. However, some quarters are worth more depending on date, mint mark, and condition.
Melt? $5.80. Depending on mint mark and condition it might be worth more.
It depends on the number of coins made at each Mint.
1929 Wheat Penny; With no mint mark, in good condition is worth $0.15, uncirculated is worth $13.00. With D mint mark, in good condition is worth $0.15, uncirculated is worth $32.00. With S mint mark, in good condition is worth $0.15, uncirculated is worth $18.00. More specifics are at the Related Link
1929 Wheat Penny; With no mint mark, in good condition is worth $0.15, uncirculated is worth $13.00. With D mint mark, in good condition is worth $0.15, uncirculated is worth $32.00. With S mint mark, in good condition is worth $0.15, uncirculated is worth $18.00. More specifics are at the Related Link
"JS" isn't a mint mark, it's the monogram of the coin's designer John Sinnock.From 1946 to 1964 the mint mark position on a Roosevelt dime was on the back next to the base of the torch.Please see the Related Question for more information.
It depends on the coin's date.1. Philadelphia only started to use the P mint mark on dimes in 1980. Any dime minted in Philadelphia between 1965 and 1979 won't have a mint mark and is only worth ten cents.2. Dimes minted in 1964 and earlier had the mint mark on the back, not the front, but again, Philadelphia didn't use a mint mark. These dimes were 90% silver so they're worth at least $1.40 for their silver value, but may be worth more to a collector.3. The mint mark on dimes dated 1968 and later is abovethe date, not below.
The "S" and the "D" are called mint marks which identify which US Mint produced the coin. Coins with no mint mark prior to 1980 were minted at Philadelphia. Just having an "S" or a "D" mint mark does not mean the coin is worth more. The value of a coin is generally determined by the demand collectors and investors have for the coin. The more people who want to own it, the more it is worth.
Please be more specific, which mintmark?
Unless the Eisenhower dollar came from a special mint set, it is only worth $1. If you have an "S" mint mark though, it may have come from a mint set and worth significantly more.