Steam Engine Tractor and Thresher. 4 3/4" x 3 1/4" black and white photograph of an old steam engine tractor and thresher or separator; backside notes, "J. J. Case, Rear 46" Agitator, 32" cylinder, built in 1885, formerly Gear Mach. 10 h.p. Eureka (Sunflower) Steam Engine built by Aultman Taylor, Mansfield, Ohio.