Original oil and gas trade magazine vintage ad for MINNEAPOLIS-HONEYWELL REGULATOR COMPANY. Main office and plant of the Industrial Division was located at Wayne and Windrim Avenues, in Philadelphia, PA. For flow measurements, the Honeywell Differential Converter is better than ever. Standard of performance for remote measurements of flow and differential pressure. This unique 1954 old petroleum refining industry magazine advertisement would display beautifully matted and framed. Two page gatefold advertisement.