This prized 5980 with blue dial was the very first Nautilus chronograph! Now discontinued and in beautiful condition, this famously comfortable Nautilus is complete with its Patek Philippe box, Certificate of Origin, instructions and stylus. It's no secret how well the prices have grown for these sought after models and it's becoming harder to find superb examples like this. Waterproof to 120m and sporting a sapphire crystal case back that reveals the automatic winding CH-28 520 chronograph flyback movement with signature Patek seal.