Fortis Black Automatic Watch # 623.10.51-L01 (Men Watch). Band Color : Black. Dial Color : Black. Display Type : Analog. Item Shape : Round Shape. Band Material : Leather. Case Size Thickness : 11.5 millimetres. Case Size Diameter : 40 millimetres. Band Width : 20 millimetres. Case Material : Stainless Steel. Clasp Type : Tang. 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 : Pointer Date and Day of the Week around inner rings. Model Number:623.10.51-L01 623.10.51-L0 623.10.51-L 623.10.51-.