With Ceramic Tip.

Another OTHO invention is the porous ceramic ball-point. It looks a bit like the surface of the moon if you look at it under the microscope! The slim inside cartridge contains not the usual viscous substance, but a thin conventional ink that guarantees an absolutely regular flow and a uniform script . Especially light: suitable for making fine entries in calendars and note-books and for work with figures, or writing comments in margins.