These cufflink logo is one of the most notorious pirates of all time, the calico jack pirate cufflinks are made in blue enamel on a nickel plated backing. These are blue enamel Calico Jack cufflinks. John Rackham (December 21, 1682 – November 18, 1720 in Jamaica), also known as Calico Jack, (often spelled Rackam or Rackum in contemporary documentation), was an English pirate captain during the early 18th century. These cufflinks are great for everyday wear, special occasions and weddings. They make a perfect gift for the Groom and Groomsmen, that special someone, or just for yourself! Enamel & Silver Plated. Display Beautifully in Included Jewelry Box. Bullet Back Closure. Dimensions: Approx. 3/4" Diameter.