Duesenberg Model J chassis 2560, powered by engine J‑534, is one of the most elegant and visually captivating late-production Model Js. Featuring a rare Convertible Coupe body designed by Herb Newport and constructed by the A.H. Walker Company of Indianapolis, it is widely regarded as one of the most attractive body styles ever mounted on a Duesenberg chassis.

The design originated with Herb Newport, one of Duesenberg's own stylists, who sought to create a body that combined the sporting character of a convertible coupe with the prestige and presence expected of the marque. The coachwork was then executed by the A.H. Walker Company of Indianapolis, a firm well known for its craftsmanship and proximity to the Duesenberg factory.

This body style was marketed under the LaGrande banner, Duesenberg's in-house coachbuilding division, and represented one of the company's final efforts to offer striking, fashion-forward designs during the last years of production.

Only three Walker Convertible Coupes were built on speculation by Duesenberg, making chassis 2560 one of the rarest examples of this distinctive design.

The car was originally delivered to Dr. Frederick Gruneck of Chicago, a prominent physician who would later become the founder of Northridge Hospital Medical Center.

As befitted a successful professional during the Classic Era, Dr. Gruneck selected one of the most dramatic and exclusive automobiles available. The Walker Convertible Coupe's combination of luxury, elegance, and modern styling made it a fitting choice for an owner seeking something beyond the more common Duesenberg body styles.

The Walker/LaGrande Convertible Coupe is notable for its sophisticated proportions and carefully balanced styling.

The design successfully blends:

- Graceful convertible coupe rooflines

- Clean, flowing fender contours

- Restrained yet elegant ornamentation

- A sporting character without sacrificing luxury

The result is a body that many historians and enthusiasts consider one of the most beautiful ever fitted to a Duesenberg.

Unlike some of the more flamboyant custom creations of the 1930s, the Walker design achieves its impact through proportion and detail rather than excessive decoration, perfectly complementing the engineering excellence of the chassis beneath.

As one of only three examples built, the Walker/LaGrande Convertible Coupe remains a highly significant and exceptionally desirable chapter in the history of the "World's Mightiest Motor Car."