The first digit is the last digit of the production year, the following four digits are the serial number. Five digits no space after the first digit were used from 1951 to 1956 and from 1961 to 1967 for both acoustic and electric models.
How do I decode an Epiphone serial number?
Locate the serial number on the headstock of the guitar. With Semi-Hollow models on the label inside the top f-hole and with acoustic guitars on the label inside the sound hole. It consists of a number of ditgits, often also in advance of one or two letters.
How do you decode a fender serial number?
Four or five digit serial number on the neck plate with no letters, 1954 - 1963. Serial number on neckplate starts with an L, 1963 - 1965. Big F on the neckplate with a six digit serial, 1965 - 1976. Serial number starts with a letter followed by six or seven digits, 1976 - present.