Description Product Description In the early part of the twentieth century, the history of the modern guitar began. Martin's early Standard Series Dreadnoughts set into motion the guitar's prominent role in modern music and set the standard for tone quality in acoustic guitars. Martin's Standard Series models became known for resonant warm tones, quality craftsmanship and tasteful styling. For those reasons Martin guitars became an important part of the music written and performed by the famous musicians and singing stars of the '20s and '30s.