When it was released, the J-55 carried on the tradition of Gibson round-shoulder acoustic instruments. It was one of four Jumbo guitars offered by Gibson in the 1930s, becoming extremely sought after decades after its original release. The Custom Shop 1939 J-55 features premium ebony on the fingerboard and bridge, a long-scale neck, and a Thermally Aged Adirondack red spruce top. Distinctive custom additions include a Moustache bridge, terraced fire stripe pickguard, and a wide 1.77" nut width.