Original oil and gas trade magazine vintage ad for INDEPENDENT EXPLORATION COMPANY. Main office was located at 1973 West Gray Street, Houston, TX Pictured is Mr R. T. Bob Penny, supervisor in the Mid-Continent and Rocky Mountain areas, has held practically every field job on an IX seimograph crew. Geophysical Surveys of Houston, TX. Derricks Today Where I.X. Parties Were Yesterday. Unique 1955 old oilfield petroleum industry magazine advertisement would look sensational matted and framed. Great graphics. Approximate size 9 x 12 inches.