Full-bodied in both tone and stature, the aptly nicknamed "Jumbo King” is the largest size offering in the Waterloo line and a modern day tribute to jumbo-sized guitars of the early 1940s. Originally manufactured by Regal for the mail-order enterprise Montgomery Ward, this slope-shoulder body size was designed to provide performers of the era with enough volume and power for professional radio work. The WL-JK accomplishes this and more by employing a full five-inch body depth and a slightly narrow waist to enhance both the bass and treble response.

Full-bodied in both tone and stature, the aptly nicknamed "Jumbo King” is the largest size offering in the Waterloo line and a modern day tribute to jumbo-sized guitars of the early 1940s. Originally manufactured by Regal for the mail-order enterprise Montgomery Ward, this slope-shoulder body size was designed to provide performers of the era with enough volume and power for professional radio work. The WL-JK accomplishes this and more by employing a full five-inch body depth and a slightly narrow waist to enhance both the bass and treble response.