Singer Manufacturing Company made many items for use by the military in World War II. This wrench was one of those items. It was to be used on Machine Guns. The picture is of one of the original boxes and a wrench. The wrench was packed in grease. Through the years, the boxes have absorbed some of that grease and have turned darker but they still have the label showing the Singer name and what it is. The box you will receive will not look exactly like the one in the picture, in other words, but in good shape and unopened.
Very unique item.