Original oil and gas trade magazine vintage ad for PETRO-CHEM DEVELOPMENT COMPANY, INC, of New York City, NY. No denying the facts, over 1250 Petrochem Isoflow furnace installations throughout the world. For refiners using catalytic process including cracking, reforming, alkylation, polymerization, desulfurization, dydrogenation and dehydrogenation. This unique 1955 two-page gatefold old petroleum refinery industry equipment magazine advertisement would display beautifully matted and framed.