Serial Number on Peghead Decal. U.S. made Fenders, starting in mid-1976 has the serial number on the peghead. Note the following number could be off as much as two years. Generally speaking, a “S” prefix equals the 1970's, “E” prefix equals the 1980's, and “N” prefix equals the 1990's. Note “E” and “N” prefix models are sometimes also Japanese-made (see below). 7600000 (“76” in bold) = 1976-1977 800000s = 1979-1981 1000000 to 8000000 = 1976-1981 (7 digits) S1 to S5 + 5 Digits = 1979-1982 S6...