Original oil and gas trade magazine vintage ad for NATIONAL TUBE COMPANY of Pittsburgh, PA. Over the Top to Eliminate Washouts and Cut Down Maintenance. Let old Bird Creek overflow whenever it will. Its raging torrents can never harm the tow pipe lines on this 340 foot span, four feet above high water mark. Cities Service Gas Company took this unusual means to insure uninterrupted service at their Tallant, Oklahoma crossing. Unique 1930 old oilfield petroleum pipe line equipment magazine advertisement. Nice graphics.