Laguiole cartridge pen

Any cartridge pen users out there? I have a pretty Laguiole cartridge pen (at least it claims to be, though it wasn't expensive), never been used. I'm not sure what kind of cartridges it needs. I bought it several years ago, intending to give it to my niece, but since it doesn't take standard cartridges (maybe needs European ones?), I decided not to. Anyone want it?