The Adina Amphibian dive watch NK167 S2FS is robustly constructed from cold stamped, nickel free all stainless steel. This classic divers’ case houses a fully repairable Swiss movement,in addition is equipped with a sapphire crystal for unparalleled scratch resistance. The Amphibian Collection all being 20ATM water resistant are designed for everyday use including swimming, showering and adventures of almost any kind! This performance based Adina Amphibian employs an internally threaded screw crown system for supreme water and dust protection. .The Adina Amphibian dive watch NK167 S2FS feels superb on the molded P.U. strap but can also be fitted with an exquisite feeling solid stamped stainless steel bracelet.