The main technical feature of this pen is its depression filling system, a clear imitation of the [[Vacumatic]] one. The pens were also made with transparent body in order to display the ink level. The cap was screw closed. | The main technical feature of this pen is its depression filling system, a clear imitation of the [[Vacumatic]] one. The pens were also made with transparent body in order to display the ink level. The cap was screw closed. |