WATERMAN FOUNTAIN PEN CONVERTER.  INSTEAD OF USING CARTRIDGES, YOU CAN FILL THE PEN FROM A BOTTLE OF INK.  THIS WILL FIT IN   ALL WATERMAN FOUNTAIN PENS THAT  USE THE STANDARD WATERMAN CARTRIDGES . LIKE   EDSON, LAUREAT, PHILEAS, EXCLUSIVE, ETALON, MAN, OPERA, KULTUR,    THESE WILL FIT IN ALL WATERMAN FOUNTAIN PENS.  THE ONES THEY MAKE NOW DAYS   DO NOT HAVE THE METAL AT THE THE END