Original oil and gas trade magazine vintage ad for JENKINS BROTHERS of New York City, NY. Jenkins Designed for Trouble-Free Performance... A Stainless Steel Y to Lower Costs in a Wider Range of Corrosive Services. Jenkins Globe, Gate, Check and Y Valves. Dupont Teflon Discs, Packing and Gaskets. Unique 1955 old petroleum industry magazine advertisement. On the reverse side is an ad for STEWART AND STEVENSON SERVICES, INC. of Houston, TX. Where Else Can You Get This Impartial Evaluation Of Your Power Needs. The Nation's Largest Distributors of GM Diesel Engines. Service to the Customer is the rule we live by at Stewart and Stevenson Service. The Engines and products handled by Stewart & Stevenson Services are recognized leaders in their field. Old 1955 petroleum industry equipment magazine advertisement.