The Yamaha FG-75 red label (c. 1968–1974) is a vintage, parlor/auditorium-sized acoustic guitar known for its warm tone and durable, ladder-braced construction. Key specs include a spruce top (usually laminate), mahogany or agathis back and sides, a mahogany neck, and a rosewood fretboard. It features a 24.9" to 25.3" scale length and a 1-3/4" nut width. 
 
Key Specifications & Details:
Production Era: Late 1960s to early 1970s (Red Label).
Manufacturing Location: Japan (early models) and Taiwan (later red labels).
Body Type: Small-bodied parlor/folk/auditorium (approx. 40" total length).
Top Wood: Spruce (typically laminate/plywood).
Back/Sides: Mahogany or Agathis.
Neck: Mahogany or Nato.
Fretboard: Rosewood.
Scale Length: ~24.9" to 25.3".
Nut Width: ~1-3/4".
Bracing: Ladder-bracing.
Tuners: Often nickel strip tuners with white buttons. 
 
Key Takeaways:
Sound: Known for a warm, intimate"woody" tone suitable for folk and fingerstyle.
Build: Highly regarded for being well-built, though generally utilizing laminate woods.
Labels: Red labels signify early Nippon Gakki (Japan) or early Taiwan factory production, often considered more collectible than later labels