Made from 1950-53, the 413D was the first of the line of the classic two-burner streamlined case stoves. It has the "slideaway" legs instead of flip-over legs, and a tight-fitting lid instead of a basic flat metal sheet lid. The burner/manifold is stamped steel and the burners are the standard Band-a-blu. The bronze finish steel fuel tank is the last of the cylindrical tanks before going to stamped two-piece tanks. John