Original oil and gas trade magazine vintage ad for GLOBE OIL TOOLS COMPANY of Los Nietos, CA. Features That Tell in Better Performance, Serrated Cutter Blades and Drop Forged Alloy Steel Construction and Heavily Set with Diamond Sub Metal. H.C. Smith Coring Outfits. This unique 1930 old oilfield petroleum drilling equipment magazine advertisement would display fabulous matted and framed. Great graphics.