Original oil and gas trade magazine vintage ad for LARKIN PACKER COMPANY, INC. of St. Louis, MO. Larkin Floating and Guiding Equipment. On the reverse side is an ad for Petrochem Isoflow Furnaces. Petro-Chem Development Company, Inc., was located at 122 East 42nd Street, New York City, NY. Representatives were Bethlehem Supply, Tulsa and Houston; Flagg, Brackett & Durgin, Boston; D.D. Foster, Pittsburgh; Faille-Levally, Chicago; Lester Oberhaltz, Los Angeles; Gordon D. Hardin, Luisville; Turbex, Philadelphia. 100 Million Dollars Worth of Plants Fired With Petrochem Isoflow Furnaces. Unique 1955 oilfield petroleum industry magazine advertisement. Approximate size 9 x 12 inches.