Dupor No.24 industrial respirator, rubber, metal and cloth, made by H.S. Cover, Indiana, U.S.A., 1940-1960 Dupor No.24 industrial respirator 1940-1960
Oliver No. 7 tractor drawn 2-furrow plough, c. 1917, with disc coulters (one coulter arm and disc missing), and land wheel operated lifting mechanism, by the Oliver Chilled Plough Works, South Bend, Indiana, US. Designed for use with the Fordson Model 'F' tractor. Oliver No. 7 Tractor Drawn 2-Furrow Plough 1912-1922
