TSAR BOMBA 8209-STAR Guardian:Upgrade lighter aerospace grade hard material-frame of carbon fiber which ensure ideal shock resistance. T-Series-8209 born in the Sino-German Force Lab.A subtle crystallization of watchmaking craftsmanship and high-tech materials.International award for barrel-shaped design, Ergonomic fit. With double-sided high-transparent hollow design, allowing you to have a high-definition and transparent mechanical sense of sight, all the exquisite designs at a glance.