Neck is straight, sound is true. Serial # 232426 1.69 Nut width. Includes Original Hard Shell Case. The item "Vintage Martin 1968 D-28 Acoustic Guitar with Original Hard Shell Case" is in sale since Friday, August 9, 2019. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Acoustic Guitars".The seller is "mainstreetpawnshop" and is located in Pontiac, Michigan. This item can be shipped to United States.