Original oil and gas trade magazine vintage ad for SUN SHIPBUILDING & DRY DOCK COMPANY, of Chester, PA. Big Top Refinery Style, floats through the air with the greatest of ease well describes this big-top aerial performer, the cap for an oil refining pressure vessel 55 feet in diameter. Very much in the act are the riggers and crane operators. They have had long experience in handling giant assemblies and heavy machinery for refineries, chemical plants and many other industries. This unique 1953 old petroleum refining process industry equipment magazine advertisement would display beautifully matted and framed.