Ralph E. Bills Body Company – Detroit, Michigan? – built the 4-door sedan body for the 1926 Masterbilt  Six prototype which was placed on a Marmon chassis and made by the Govreau-Nelson Manufacturing Company of Detroit.

For more information please read:

Beverly Rae Kimes - The Classic Car

Beverly Rae Kimes - The Classic Era

Beverly Rae Kimes - Packard: A History of the Motorcar and Company

Beverly Rae Kimes & Henry Austin Clark Jr. - Standard Catalog of American Cars 1805-1942

Richard Burns Carson - The Olympian Cars

Raymond A. Katzell - The Splendid Stutz

Marc Ralston - Pierce Arrow

Brooks T. Brierley - There Is No Mistaking a Pierce Arrow

Brooks T. Brierley - Auburn, Reo, Franklin and Pierce-Arrow Versus Cadillac, Chrysler, Lincoln and Packard

Brooks T. Brierley - Magic Motors 1930

Nick Georgano - The Beaulieu Encyclopedia of the Automobile: Coachbuilding

John Gunnell - Standard Catalog of American Cars, 1946-1975

James M. Flammang & Ron Kowalke - Standard Catalog of American Cars, 1976-1999

Daniel D. Hutchins - Wheels Across America: Carriage Art & Craftsmanship

Marian Suman-Hreblay - Dictionary of World Coachbuilders and Car Stylists

Michael Lamm and Dave Holls - A Century of Automotive Style: 100 Years of American Car Design

Thomas E. Bonsall - The Lincoln Motorcar: Sixty Years of Excellence

Fred Roe - Duesenberg: The Pursuit of Perfection

Arthur W. Soutter - The American Rolls-Royce

John Webb De Campi - Rolls-Royce in America

Hugo Pfau - The Custom Body Era

Hugo Pfau - The Coachbult Packard

Griffith Borgeson - Cord: His Empire His Motor Cars

Don Butler - Auburn Cord Duesenberg

George H. Dammann - 90 Years of Ford

George H. Dammann & James K. Wagner - The Cars of Lincoln-Mercury

Thomas A. MacPherson - The Dodge Story

F. Donald Butler - Plymouth-Desoto Story

Fred Crismon - International Trucks

George H. Dammann - Seventy Years of Chrysler

Walter M.P. McCall - 80 Years of Cadillac LaSalle

Maurice D. Hendry - Cadillac, Standard of the World: The complete seventy-year history

George H. Dammann & James A. Wren - Packard

Dennis Casteele - The Cars of Oldsmobile

Terry B. Dunham & Lawrence R. Gustin - Buick: A Complete History

George H. Dammann - Seventy Years of Buick

George H. Dammann - 75 Years of Chevrolet

John Gunnell - Seventy-Five Years of Pontiac-Oakland