Image Item No. Description  2-6 (Inv)  Motor Bushings 2 Parts, 1977 Catalog: Sets: Service Packs  1107-1 (Inv)  Signal and Direction-Change Switch 4 Parts, 1977 Catalog: Sets: Service Packs: Train  1108-1 (Inv)  Magnetic Couplings 4 Parts, 1977 Catalog: Sets: Service Packs: Train  1118-1 (Inv)  Boat Weight, Red 1 Part, 1977 Catalog: Sets: Service Packs  1121-1 (Inv)  Propellers, Wheels and Rotor Unit 9 Parts, 1977 Catalog: Sets: Service Packs  1125-1 (Inv)  Crane Grab 3 Parts, 1977 Catalog: Sets: Service Packs