This is an unusual Kin Sin cartridge fountain pen c1980s-1990s. Although it’s silver in color, there are no hallmarks. The cap and barrel has rows of different Chinese characters representing teeth. The depth and detail of the raised characters probably means the cap and barrel were cast. The clip, section and end caps appear to be chrome plated. The very firm stainless steel nib is deeply inset into the ribbed nib section and appears to be simply a standard open nib unit with the section extended to cover most of it. There is very little information on the Kin Sin Pen Company in English. Researching posts on Fountainpennetwork gave some clues, as follows: Jinxing, or Kin Sin, or Golden Star 金星, according to various collector’s stories, was a Shanghai pen maker started by three Korean brothers in 1932. The company opened a Beijing factory in 1952. The pen, nib or packaging will show a star in a ring as the manufacturer’s symbol. In this case, the mark is on the inside of the pen box. Pens from Shanghai were marked Kin Sin Pen Company and the Beijing pens were marked Golden Star Pen Company. The pen is 5 ¼ inches long.