Instructions
Examine the blade for the words BUCK with U.S.A. underneath it. This will determine if the knife is an authentic Buck knife.
Check to see if there is a model number between BUCK and U.S.A. If not, then the blade was made before 1973.
Look closely at the model number if it appears on the blade. If the number has one dot before and after it, the knife was made between 1974 and 1980. A number with one dot before and two dots after means the knife was made in 1980. If the model number has two dots before and two dots after it, the knife was made between 1981 and 1986.