Tissot Seastar 1000- Quartz GMT Watch Details Collections: T-Sport Water Resistance: 30 Bar Case: 40 mm Lug: 20 mm Case Option: Mineral Bezel Ring, Screw Down Crown and Caseback, Engraved Caseback Crystal: Sapphire Movement: Swiss Quartz Dial: Black with Indexes Strap/ Chain Reference: T605049629 Strap Details: Stainless Steel, Folding Clasp with Safety, Push Buttons and Interchangeable Quick Release Bracelet