Fortis Black Automatic Watch # 597.20.71-M (Men Watch). Band Color : Silver Tone. Dial Color : Black. Display Type : Analog. Item Shape : Round Shape. Band Material : Stainless Steel. Case Size Thickness : 15 millimetres. Case Size Diameter : 40 millimetres. Band Width : 20 millimetres. Case Material : Stainless Steel. Clasp Type : Fold Over. Bezel Material : Fixed Stainless Steel. Bezel Function : Fixed Stainless Steel. Crystal : Scratch Resistant Sapphire. Water Resistant Depth : 100 meters / 330 feet meters. Movement Type : Automatic. Calendar Type : Day of the Week and Date. Model Number:597.20.71-M 597.20.71- 597.20.71 597.20.7.