A never-ending pencil and a work of art? Named after - and inspired by - the award winning Pininfarina Cambiano concept car of 2012, the pencil takes several design cues from the concept, notably the sleek lines and inset wooden detailing.

This is a special edition celebrating the genius of Leonardo da Vinci, who was not only an artist but a scientist, engineer and humanist, and whose works and observations have inspired generations.

Using a clever and patented metal alloy tip (Ethergraf®) to produce a precise, graphite-like line, the Pininfarina Segno Cambiano writes like a hard pencil, and its markings - which are lighter than a normal pencil - can even be erased like one. Like a pencil, it works by leaving a bit of the 'lead' on the paper, but the metal alloy wears down so slowly it should last for a lifetime of use.

All Pininfarina Segno Cambiano pencils are made entirely by hand in Italy.

The sleek body tapers from the middle of the pencil to the tip. Measures 160mm long, barrel diameter ranges from 10mm at its widest to 4mm near the tip, weighs 39g.

Supplied in a solid walnut wood presentation box which also doubles as a decorative yet functional desk stand for the pencil.