This company, located in Chester, PA a few miles south of Philadelphia, was developed by Sun Oil Company and launched its first ship in 1917 just as the US was entering World War I. At the start of World War II it was among the country's five largest shipyards with eight slipways. Twenty slipways were added during the war making it the country's largest shipyard. At its peak more than forty thousand workers were employed. The company built 281 T2 tankers during World War II, about 40% of the US wartime total. It also produced hospital ships, cargo ships, and others. The majority offered here would be tankers. Each button is 1.75". There are some small rust/oxidation marks on some of these reverses but all the fronts display extremely clean with almost no stain at all. All have nice gloss and unfaded color. The dates in this group run between January 21, 1943 and November 15, 1943. Among the more interesting ship names are: Fort Lee, Fort Necessity, Fort Duquesne, Lake George, Winchester, Marine Wolf, Kittanning, and Lookout Mountain. See following related lots.