Image Item No. Description  1131-1 (Inv)  Tires (42 mm) and Hubs 4 Parts, 1981 Catalog: Sets: Service Packs: Technic  1148-1 (Inv)  Differential 5 Parts, 1981 Catalog: Sets: Service Packs: Technic  1149-2 (Inv)  Bulldozer Chainlinks 52 Parts, 1981 Catalog: Sets: Service Packs: Technic  1197-2 (Inv)  Crown Gears 2 Parts, 1981 Catalog: Sets: Service Packs: Technic  8710-1 (Inv)  Expert Builder Parts Pack 124 Parts, 1981 Catalog: Sets: Technic: Expert Builder  8844-1 (Inv)  Helicopter 316 Parts, 1981 Catalog: Sets: Technic: Expert Builder  8845-1 (Inv)  Dune Buggy 174 Parts, 1981 Catalog: Sets: Technic: Expert Builder  8848-1 (Inv)  Power Truck 398 Parts, 1981 Catalog: Sets: Technic: Expert Builder  8859-1 (Inv)  Tractor 614 Parts, 1981 Catalog: Sets: Technic: Expert Builder