Original oil and gas trade magazine vintage ad for PITTSBURGH EQUITABLE METER COMPANY of Pittsburgh, PA. The Petroleum Industry Is Grateful to Colonel Drake for his discovery of a new and better method of obtaining oil from the ground. Merco Nordstrom Valve Company, Nordstrom, Pittsburgh and Emco Products. This unique 1934 old petroleum oilfield pipe and valve industry magazine advertisement would display magnificently matted and framed. Approximate size 10.5 x 13 inches.