41mm mens watch China NH35 automatic mechanical movement diving mens watch sapphire glass stainless steel watch 316L strap

Watch brand: OUMASHIMovement type: Automatic mechanical movementMovement model: Chinese NH35 movementCase material :316L stainless steelCase process: drawing + polishingBack cover material :316L stainless steelBack cover type: screw in solid back coverCase diameter :41 mm (excluding crown)Case length :48 mm (overall length)Case thickness: 12.5mm (including lens and back cover)Case ear position :20 mm (where case and band join)Watch length :220 mm (total watch length/circumference)Strap material: stainless steel + full frosted strapGlass material: sapphire glassCrown type: screw-in crownBezel material: Ceramic bezelBaffle function: one-way rotationBaffle size :38 mmSurface color: Roman numerals natural gemstone dialSurface size :28.5 mmNeedle technology :C3 greenWaterproof rating :10ATM Waterproof/diving [can wash hands, swim, dive, meet all daily waterproof requirements]Exhaust valve: No