The 601.NX.0173.LR from the Spirit of Big Bang collection delivers the highest watchmaking skills in an oversized sleek case. The 601.NX.0173.LR has a tonneau-shaped titanium case that is 51mm x 45mm in diameter and an exhibition case back. It comes with a scratch-resistant sapphire crystal, screw-down crown, and Chrono push buttons and fixed titanium bezel. It has a skeleton dial with three sub-dials, a date disc, and luminescent hands and index hour markers. The 601.NX.0173.LR is powered by the self-winding HUB4700 caliber which has chronograph and date functionality with a power reserve of 50 hours. The case is paired with a black alligator leather bracelet with a titanium double fold-over clasp. It has a water resistance of 100 meters (330 feet).