Patent model (U.S. Patent No. 34,726) of a portable bake oven, made by George W. Ayres of Rahway, NJ, and patented on March 18, 1862. Consists of a double-shelled, round-arched body with door at one end on a flat, hollow base containing two furnaces or fireboxes with perforated sides, one running the width of each end, and a diagonal reflector between them. The inner shell is a flue surrounding the oven with two chimneys of smoke pipes. The outer shell is an insulating cavity to be filled with sand; openings for filling and emptying its contents are at the middle of each side. No marks on object, but paper tags tied with red wove ribbon to one smoke pipe and stored with object are printed and handwritten with patent information and object numbers.