I think it has just come unscrewed. I have never taken it out to see. Still functions and plays fine.... Unless you play upside down I guess. Other than those three things it is nearly new condition for a 41 year old guitar.Made in USA in 1978. Ebony fretboard, original Dimarzio pickups. Everythin is original except the low E saddle. The item "1978 Guild s300d withoriginal case and owners manual. Rare vintage guitar" is in sale since Sunday, August 2, 2020. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Electric Guitars". The seller is "danholland33" and is located in Sarasota, Florida. This item can be shipped to United States.