The Classic Fusion 520.NX.7170.NX from Hublot is a must-have for Hublot enthusiasts who are building a classic watch collection. The 520.NX.7170.NX has a round-shaped Titanium case that is 45MM in diameter with a scratch-resistant sapphire crystal and screw-in crown with a fixed titanium bezel. It has a blue dial with two sub-dials and polished index hour markers. The 520.NX.7170.NX is powered by the self-winding HUB1131 caliber which has chronograph functionality with a power reserve of 42 hours. The case is paired with a grey titanium bracelet with a titanium push-button folding clasp. It has a water resistance of 50 meters (165 feet).