Silver Ballpoint Pen Cosmo Pinstripe Pattern. This Silver Cosmo Ballpoint pen was a new design for 2014 and is fully hallmarked 925 sterling silver. The top and lower part of the silver ballpoint pen has a wide line pattern. The silver Cosmo also has an engraving panel alongside the clip and has a twist mechanism. In a luxury presentation box including a 10 year guarantee and silver cleaning cloth. Also available as a Pencil, Rollerball and Fountain Pen. See below for matching pens, refills and accessories.