Designing a fountain pen to commemorate the 500th anniversary of Leonardo's death was a delicate challenge. No other artist's work has suffered more kitsch interpretations, Cenacolos and Giocondas have invaded all kinds of bibelots.

My pen alluded to a paintbrush, the clip was made of unkempt hairs and where the number defining the thickness was usually located, the number 500 appeared. The fact that the best sable brushes are from the da Vinci brand was a fortunate coincidence.