Caliber. 357 Bain And Davis. Built by Dave Van Horn. These barrels are New Old Stock. Some have been on the shelf and, traveling back and forth to gun shows for several years. The lugs are welded on with stainless steel rod, the welds may have incomplete bluing, based on how the fill rod mixed with the base metal. It does not mean the barrel was incorrectly blued. T/C frames vary slightly over their 40+ year production. We test fit all barrels on our frame(s) for correct fit and function. In rare cases, you may need to perform minor fitting of this barrel to your frame.