A set of Sergeant chevrons made in Shapeways stainless steel. The 3-D printing process can leave small visible printing lines. While I for one really like the unique appearence of the print lines, these can easily be polished out as seen in this forum post from another member.
Looking for a set in polished Sterling Silver? Look here www.shapeways.com/model/228387/sergeant_chevron_cufflinks___silver.html