The Sheaffer piston converter is proprietary, and will only fit Sheaffer fountain pens, except for the VFM. The Sheaffer piston converter may fit some vintage pens, but not all.
The Sheaffer piston converter is proprietary, and will only fit Sheaffer fountain pens, except for the VFM. The Sheaffer piston converter may fit some vintage pens, but not all.