OTHER Waterman CF Fountain Pen Ink Cartridges (2) - Vintage, Hard to Find (Dried Up but Refillable) $11.00 Hard to Find Waterman CF ink cartridges. These are the cartridges required for the CF fountain pens (among others):Since the converters for these models are virtually impossible to find, these dried-up (but unpunctured) refills can save the day as they... Choose Options