Nixon 51-30 Chrono Leather Watch. Nothing else quite measures up. Named after the face size (51mm) and water-resistant rating (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. Pushing against the notion that watches had to fade into the background of an outfit, the 51-30 Chrono Leather is designed to go big in every sense. A chronograph titan with Big. Time. Style. 300 meter / 30 ATM water resistance and solid stainless steel construction, laced with a leather band, the 51-30 Chrono just got more resilient. The crown and pushers are located on the 9 o'clock side of the case instead of 3 o'clock to prevent ""wrist bite"" during active use. Uni-directional rotating bezel for an analog countdown timer. Six-hand chronograph with 24hr and second timer subdials. Updated Miyota - OS20 Japanese quartz 6 hand chronograph with date and a 9-hour crown and pusher placement. Imported.