This roll contains c 100 acetate and paper drawings. These drawings by GEC Traction and GEC Transportation Projects Ltd are of mechanical parts and axle stress concentrations and curves for Brazil, South Africa Railways and British Rail Class 373. Includes drawing numbers T3104, T3104-T3107, T3110, T3112-T3113, T3115, T3117-T3119, T3125, T3127, T3134-T3136. The majority of the drawings are dated 1980-1989, the one drawing dated 1953 was traced for this order.