Original oil and gas trade magazine vintage ad for OIL WELL SUPPLY COMPANY of Pittsburgh, PA. Setting and Cementing More Than A Mile of 8 5/8 Inch 40 Lb Casing in the California Field with an Oilwell Imperial Rotary. Pictured is the Milham Exploration Company's well Playa del Rey No. 2. Unique 1927 old oilfield petroleum industry drilling rig equipment magazine advertisement would display magnificently matted and framed. Nice graphics.