Stainless Steel Skull Ring with Crossed Bones (#166)Stainless Steel Skull Ring with Crossed Bones. The Skull & Crossbones symbol, as popular as it is, is also one of the most cryptic of all symbols when it comes to its history. The symbols most commonly associated with the Jolly Roger, a flag emblazoned with a skull & crossbones that pirates would use to identify their ships. The symbol's origin, however, is an unsolved mystery that leads historians back 2,000 years. The symbolism of the skull and