Silver Fountain Pen Allegro Pinstripe Design. Only 3 left in stock!! The Silver Allegro Fountain pen has a sterling silver 925 upper and lower part The Fountain Pen is fully hallmarked with pinstripe design. The Silver Allegro has an engraving panel and has a screw system cap. The Allegro Fountain Pen is presented in a Luxury Gift Box including 10 year guarantee and silver cleaning cloth. This Fountain Pen fits a standard ink cartridge or a Waldmann ink converter. Scroll below for refills and accessories.