Original oil and gas trade magazine vintage ad for BAKER OIL TOOLS, INC. of Houston, TX. The Seal of Perfection in Floating Equipment The Baker Ball-Type Back-Pressure Valve With Resilient Seal proved efficient and dependable in over 200,000 actual runs. Unique 1955 old oilfield petroleum drilling equipment magazine advertisement. On the reverse side is an ad for GENERAL AMERICAN TRANSPORTATION CORPORATION of Chicago, IL. Store and Distribute your bulk liquids as the market demands - with no capital investment. General American Tank Storage Terminals. Old 1955 petroleum storage industry magazine advertisement.