Original oil and gas trade magazine vintage ad for MARATHON LeTOURNEAU OFFSHORE COMPANY, of Houston, TX. Number One For a Number of Reasons. Total Marine Engineering, Research and Design Capabilities, 50 Percent of All Existing Jackups, Vertical Integration, Support Equipment for Tenders to Pier Islands, Self-Elevating Drilling and Production Platforms, Shallow Water Drilling Rigs. Unique 1977 old multi-page oilfield petroleum industry well drilling equipment magazine advertisement. Three-page gatefold advertisement.