Original oil and gas trade magazine vintage ad for ARMCO STEEL CORPORATION of Pittsburgh, PA. National Supply store has the answers to your paraffin problems? Five reasons for National Supply sucker rod superiority are new production facilities, undercut pins, rolled threads, high-strength stress relieved couplings and special packaging. pictured is a National tubingless completion wellhead located near Spearman, Texas. A Type G independent casing head, with dual hanger, is used to suspend two string of 2 7/8 inch tubing. Two Type S tubing heads suspend 1 1/4 inch siphon strings inside the larger tubing. The multiple string wellheads meet all needs from low pressure pumping to high pressure gas or oil wells. This unique 1962 oilfield petroleum drilling industry equipment magazine advertisement would display beautifully matted and framed. Four-page gatefold technical ad.