Original oil and gas trade magazine vintage ad for GROVE VALVE and REGULATOR COMPANY. A subsidiary of Walworth Corporation. Main office was located at 65th and Hollis Street, Oakland, CA. Christmas Tree Valv-Pac, a development of major significance for both oil and gas production service. It combines in a single, compact unit the major well head components. This unique 1959 old oilfield petroleum well equipment magazine advertisement would display beautifully matted and framed.