Revue Thommen Diver Professional Automatic Chronograph pairs a robust 45 mm stainless steel case with a reliable Valjoux 7750 automatic movement. Designed for diving, it delivers precise chronograph timing and clear day–date visibility. Key attributes: Black | Stainless steel | Water resistance 30 bar | Automatic chronograph movement (Valjoux 7750) | Sapphire crystal | Chronograph (stopwatch) | Day–date calendar | Rotating bezel | Pin buckle closure | Round case | Black bezel | Black dial | Rubber strap 24 mm | Dimensions & fit: Case diameter 45 Millimeter | Case height 16 Millimeter | Band width 24 Millimeter | Standard strap length | Composition & care: Stainless steel | Rubber | Sapphire crystal | Wipe clean with a soft cloth; avoid harsh chemicals and extreme temperatures; have the movement serviced by a professional at regular intervals.