There are only a few writing instruments which have been successful in the market for decades without big changes. One of them is of course the Kaweco Classic Sport. It follows the design of the year

Kaweco Sport Classic Fountain Pen - Green - F Nib (fine)

There are only a few writing instruments which have been successful in the market for decades without big changes. One of them is of course the Kaweco Classic Sport. It follows the design of the year 1935. A friendship for generations.Fountain Pen:
Gold-plated steel nib and iridium tip for ink cartridgesClosed version has a length of only 10.5 cm and open version 13.5 cm

Kaweco Sport Classic Fountain Pen - Green - F Nib (fine)