Nixon 51-30 PU Matte Black/ Surplus Movement: Custom 3 hand Swiss quartz with easy to read tide dial. Fast adjust buttons for easy setting of tide. Case: Custom 300 meter stainless steel with hardened mineral crystal, external rotating bezel with countdown timer, & screw crown at 9 clock position. 51.25mm diameter. Band: Custom injected polyurethane band with patented locking looper & stainless steel buckle. 25mm wide.