Since 1883, there have been various systems for filling a fountain pen. Today, ink cartridges are a widespread and popular filling method. In the past, fountain pens were mainly filled using ink bottles. Beside lever fountain pens and eyedroppers, the piston mechanism has been the most important and reliable filling system. In 1937, the Kaweco Sport Fountain Pen was first presented as a piston filler under the name #612 and has been further developed in many different versions over the years.

Thanks to its clever compact mechanism, the Kaweco PISTON Sport is one of the smallest piston filler pens available yet it still holds approx. 1ml of ink (more than a standard international cartridge). Piston fillers allow for an infinite choice of inks, as many inks are only sold in bottles, not as cartridges.  The pen can be refilled quickly and easily with the smooth-running refill mechanism. A transparent ink window allows you to monitor the ink level at all times. 

The Kaweco PISTON Sport is available either as a ready-to-use Starter Set, complete with a 32ml bottle of Royal Blue ink, or on its own. The Kaweco PISTON Sport is presented in a novelty round nostalgic Kaweco tin, which also features a place to stand the pen upright on your desk.