Original oil and gas trade magazine vintage ad for SINCLAIR REFINING COMPANY, INC., was located at 45 Nassau Street, New York City, NY. Branch Offices were located in Atlanta, Boston, Chicago, Houston and Kansas City. The Most Inviting Sign along the Highway! Sinclair Opaline Motor Oil. This unique 1928 old petroleum products refining gasoline service station industry magazine advertisement would display fantastic matted and framed.