Original oil and gas trade magazine vintage ad for PARKER APPLIANCE COMPANY. Tube and Hose Division. Main office and plant was located at 17325 Euclid Avenue, Cleveland, OH. Announcing new Parker In-Tru Fittings, for easier, foolproof installations. Simply push, then tighten! That is all you have to do to install the new Parker In-Tru tube fittings. Flareless fittings are especially well suited for instrumentation lines of 1/4-inch through 1/2-inch outside diameters. This unique 1954 old petroleum industry equipment magazine advertisement would display beautifully matted and framed. Two page gatefold advertisement.