This is the Momentum Logic Black-ion 42mm Classic Watch Features: Perfect for those who like a simple slim professional watch 316L stainless steel case with black-ion brushed finish Comfortable 4 o&&';;clock position screw-down crown that reduces "wrist-bite" 100M water-resistance lets you take the Logic 36 anywhere High-accuracy low-maintenance Swiss quartz movement Case Material: Black-Ion Plated Stainless Steel Dimensions: Case Diameter: 42mm Case Height: 8.5mm Lug Width: 22mm Lug-to-Lug: 48.5mm The Logic is a timeless classic with a minimalist design. It can be dressed up or down easily to be worn for any occasion. The Logic 42 also features a screw-down crown, giving it 100M of water-resistance.