Nothing else quite measures up. Named after the face size (51mm) and water-resistant rating (30 ATM), the 51-30 Chrono 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. Design Pushing against the notion that watches had to fade into the background of an outfit, the 51-30 is designed to go big in every sense. Durability Dive-ready 300m water resistance and solid stainless steel construction make the 51-30 one of the burliest pieces in the line. Special Feature 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. Movement Miyota Japanese quartz 6 hand with crown placement at 9 o'clock Water Rating 300 Meter / 30 ATM Model #: A083-2871