B-Stock because there is a little spot on the top. The J-45 is Gibson's best-selling acoustic of all time. Nicknamed "The Workhorse" and first introduced in 1942, this iconic acoustic has become the cornerstone of its round-shoulder, dreadnought line. World-renowned for its full, balanced expression, warm bass, and excellent projection, the J-45 has been refined to carry this legacy to new heights. The Gibson J-45 Standard's classic combination of a Sitka spruce top coupled with mahogany back and sides deliver a sound with incredible dynamic range, warm mids, and a tight punchy bass. Now available in Cherry; a Gibson hardshell case is included.