Revue Thommen Air Speed Chronograph pairs a Swiss ETA 7750 automatic movement with a robust stainless steel case for precise timing and everyday wear. Its chronograph and tachymeter functions make it suited to active, detail-focused users who need reliable timekeeping. Key attributes: Gray | Silver | White | Stainless steel | Water resistance 10 ATM / 100 m | Scratch-resistant sapphire crystal | Swiss-made automatic movement (ETA 7750) | Chronograph | Date display (between 4 and 5 o'clock) | Fold-over clasp with safety | Transparent caseback | Round case | White dial | Transparent caseback (sight back) | Tachymeter scale | Dimensions & fit: Case diameter: 44 mm | Case height: 16 mm | Band width: 22 mm | Composition & care: Stainless steel | Sapphire crystal | Wipe with a soft, dry cloth. Avoid strong chemicals and prolonged exposure to moisture. Have the automatic movement serviced by a professional every 3–5 years. Do not operate chronograph pushers underwater.