The Luminox Master Carbon SEAL Automatic Chronograph 3880 Series XS.3881 is a 45 mm Swiss Made mechanical watch and the first automatic chronograph in the Master Carbon SEAL collection. Its black CARBONOX+™ case is three times lighter than titanium and twice as durable as standard CARBONOX™, delivering strength without unnecessary weight. The Swiss automatic SELLITA SW 500 movement powers the chronograph and day-date functions and offers a 62-hour power reserve. An exhibition case back reveals the mechanical movement, while the chronograph enables precise timing for outdoor activities and training. Sixteen Luminox Light Technology elements ensure constant visibility for up to 25 years in low-light conditions. An anti-reflective sapphire crystal protects the dial. The IP black stainless steel unidirectional bezel, screw-down crown and screw-down pushers support performance, complemented by 200 metres of water resistance. Finished with a scratch-proof black technical matrix leather strap, this automatic chronograph is designed for adventurers and mechanical-watch enthusiasts who value rugged capability with a refined finish.