The elaborate mix of 925 sterling silver and modern carbon on the cap brings together apparently contradictory materials to form a  unique combination. The barrel, like the ring and the clip, is made of 925 sterling silver and recalls the age of industrialisation  in its clarity of design. Engraved with an M. the rhodium-plated 18-carat gold nib commemorates the great financier and art lover whose legacy is one of the word’s largest and most important collections .