Kaweco AC Sport Fountain Pen - RedAbout Kaweco AC Sport Fountain Pen Red The Kaweco Sport fountain pen is one of those products that is so great, it has barely changed since it was first introduced in 1935! The octagonal design has certainly stood the test of time and the Kaweco Sport now has a worldwide cult following. Manufactured from tough aluminium, anodized in elegant colours and featuring fine carbon fibre inlays, the AC Sport is a respectable 135mm long with the cap posted,