
In 1975, the high-end series of FG models became the L Series. All these guitars featured white oval labels. Other models included the Spanish body FG-325 (obsoleted in 1978) and the Folk Guitar series with the FG-330 and the FG-331. Three 12-string models were also introduced, the FG-312, FG-412SB (cherry sunburst), and the FG-512 (laminated rosewood back & sides).

The first solid top FG models were introduced carrying an “S” suffix, which previously indicated Sunburst finish (now noted as SB). The FG-350W became the new flagship model, replacing the FG-300, featuring an adjustable 1 piece saddle. Three models with laminated mahogany back & sides, the FG-335, FG-340, and the FG-336SB and 5 models with laminated rosewood back & sides, the FG-345, FG-350W, FG-365S, FG-375S,, and the FG-351SB. In 1977 a new line of FG-3XX guitars was introduced. One of only 2 acoustic guitars they ever made with an adjustable saddle, the other being the FG-350W which would later replace it. It featured laminated rosewood back and sides, and an adjustable bridge with individually adjustable saddles. In 1968 the FG-300 became the new flagship (non-hand crafted) model.
