Silver Ballpoint Allegro Black Anthracite. The Allegro Ballpoint pen has a 925 sterling silver top part with pin stripe design and engraving panel. The lower part of the Black and Silver Allegro is made from methacrylate Anthracite and gives a beautiful black marbled effect. This silver ballpen has a twist action mechanism. The Silver Allegro ballpoint will be in a luxury Presentation Box including 10 year guarantee and a silver cleaning cloth. Also available as a Pencil . See below for matching pens, refills and accessories.