ST Dupont Streamline R ballpoint made of Ceramium ACT. This material is on average forty percent lighter in comparision to other S.T. Dupont pens. In excellent condition, with minimal signs of aging with original box, certificates and display. S.T. Dupont combines elegance with streamlining. In 1930 the industrial design changed in America. It became dynamic with light curves and it looked like a drop falling down. Please take a look at the photos.