TSAR BOMBA Elemental TB8212 Skeleton Automatic Mechanical Watch. Powered by a Seiko Epson automatic movement, the full ceramic case is lightweight, skin-friendly, and hypoallergenic, offering exceptional material texture, a high-tech aesthetic, and a lightweight wearing experience. The skeletonized dial design allows you to directly view the movement in action, letting you fully appreciate the precision and beauty of the mechanical movement. It features Grade A luminescent coating, a scratch-resistant sapphire crystal, and a fluororubber strap. Water-resistant to 50 meters (5 ATM).