The 51 30 tide watch by Nixon features custom 3 hand Swiss movement with an easy to read tide subdial. The case is stainless steel with a hardened mineral crystal face and external rotating bezel. The crown is at the 900 position next to the quick adjust button for easy setting of the tide subdial. The band is solid stainless steel with a brushed finish and a double locking clasp. Tested to 300m depth.