Composition
Old coins were made out of precious metals, usually gold, silver or bronze. The coin&'s color can often give you an idea what metal it is made from.
Country
The country that the old coin was minted in is usually written somewhere on one of the faces of the coin. This information helps you to identify the coin.
Date
Most coins have a date on the front of the coin. This is extremely important in the overall value of the coin as one date may be worth significantly more than another.
Denomination
Coins generally have their denomination written on one of their faces as well. Words like "one quarter dollar," or "half pence" will tell you the denomination of the coin.
Condition
When finding the values of old coins, the condition of the coin is extremely important. Learning how to grade coins is a time-consuming process, but coin price guides and coin dealers can help you grade coins when you first get started.