Original oil and gas trade magazine vintage ad for GRAVER TANK & MANUFACTURING COMPANY, INC. of East Chicago, IN. Double-Deck costliest and often least expensive floating roof design. Graver Floating Roof Tanks, four of which were built for the Texas Pipe Line Company at Port Arthur, TX are pictured. Unique 1955 old oilfield petroleum industry equipment magazine advertisement. On the reverse side is an ad for DETROIT DIESEL ENGINE DIVISION of General Motors, Detroit, MI. Clears More Deck for Action. Pictured is Kerr-McGee Oil Industries oil rig off the Gulf Coast. Old 1955 petroleum industry offshore drilling equipment magazine advertisement.