Nothing 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. Details Watch Size: 51mm Watch Case Material: Stainless Steel Watch Case Thickness: 15mm Watch Crystal Material: Hardened Mineral Watch Movement Type: Quartz Water Rating: 300 Meter / 30 ATM Lug Measurement: 25mm Band Material: Leather Band Connection: Screw Bar Band Type: Free Swing