Original oil and gas trade magazine vintage ad for NORDBERG MANUFACTURING COMPANY of Milwaukee, WI. For Maximum Economy in Gas Pipe Line Service ... The Nordberg Supairthermal Engine Driven Centrifugal Compressor Unit. Diesel, Duafuel and Spark-Ignition Gas Engines. Unique 1955 oilfield petroleum industry advertisement. On the reverse side is an ad for EATON MANUFACTURING COMPANY of Cleveland, OH, Axle Division. Why do More and More Truck Operators Specify Eaton 2-Speeds? More than Two Million Eaton Axles in Trucks Today! Products include Sodium Cooled, Poppet, and Free Valves, Tappets, Hydraulic Valve Lifters, Valve Seat Inserts, Jet Engine Parts, Rotor Pumps, Motor Truck Axles, Permanent Mold Gray Iron Castings, Heater-Defroster Units, Snap Rings Springtites, Spring Washers, Cold Drawn Steel, Stampings, Leaf and Coil springs, Dynamic Drives, Bakes and Dynameters. Unique 1955 old petroleum industry fleet truck magazine advertisement. Approximate size 9 x 12 inches.