In 1997, the prefix CL (Clarence Leo) began use, and a couple years later it was changed to CLF.- Perhaps the best way to date your G&L is to take the neck off. You should find two stamped dates-one in the neck pocket and one of the butt of the neck. If you see a seven digit serial number on the back of a Dean guitar, you can be sure that it was produced in United States. First two numbers in the sequence will tell you when your guitar was produced.
