Blog Gear September 28, 2016 Share Tweet Share My buddy recently asked me to appraise his mom’s Guild S100 that she bought new in 1974. I was happy to get my hands on it. It was in excellent condition. Even after 40 years, it still played well and sounded awesome. This guitar has a unique feature, a phase switch. When used with both pickups it offers an additional edgier tonal sound.