Vintage Atlantic Aviation Motor Oil can with a 5 U.S. quart capacity. Marked SAE 30 on the bottom. Produced by The Atlantic Refining Company, Philadelphia, U.S.A. Promotes protection against rust and corrosion, meeting U.S. Government Spec. MIL-O-2104 for A.P.I. services MS, MM, ML, and DG. Made for heavy-duty, high detergent use. The can shows signs of wear and rust, indicative of its age and previous use, but remains a collectible item.