Nixon - 51-30 Chrono Leather Chocolate & Dark Roast BrownNothing else quite measures up. Named after the face size (51mm) and water resistant rating (300 meter 30 ATM), the 51 30 Chrono Leather is the OG oversized watch that birthed a whole style movement. It's the ultimate statement piece, but its pro level chronograph and waterman functionality makes it so much more than a pretty face. Watch Size: 51mm Watch Case Material: Stainless Steel Watch Case Thickness: 15mm Watch Crystal Material: Hardened Mineral