The story
The All-Steel or Macon, designed by Charles L. Smith, had a conventional 4-cylinder engine made by Sterling. It had a unique narrow platform backbone frame that enclosed the propeller shaft and gearbox. The body, electrically welded, was attached to the frame and rear axle at only three points so that the body could be easily removed. It was planned to be offered at $350 to $400.
The company was reorganized as the Macon Motor Car Company in January 1917. In May 1917 the factory burned to the ground before production could start. Only prototypes had been built before the company declared bankruptcy.
From Wikipedia’s article on All-Steel, shared under CC BY-SA 4.0.3