I've been getting some of the new Sheaffer Slovenian ink carts lately and I can see they are made a bit differently. I had thought Sheaffer was switching to the new "international" cart style, but I really can't tell and haven't yet tried to force one into a generic cart pen.
Is one end old Sheaffer style and the other international? Neither? Please tell--dim minds like mine want to know!
thanks, Dan