Order now! ✅ 30-day free returns ✅ 2-year warranty ✅ Free worldwide shipping. TSAR BOMBA Dark Matter 4 Limited Edition Square Men’s Watch—the set includes 4 watch straps, 4 bezels, and 4 crowns. Featuring TSAR BOMBA’s patented interchangeable technology, you can quickly swap out the bezel, strap, and crown without any tools. Instead of buying multiple watches, why not own one that can transform into various styles? The titanium case and carbon fiber bezel feature the signature of Mexican national soccer team coach “Rafael Márquez” on the back of every Dark Matter 4 case. The dial is crafted from meteorite material—each one boasts a unique and extremely rare texture. Powered by a Swiss Sellita automatic movement, it features a proven architecture, highly durable components, and strong resistance to external impacts. It includes a date and day display. The Dark Matter 4 features Grade A luminescent coating, scratch-resistant sapphire crystal, and an interchangeable fluororubber strap. Water-resistant to 100 meters (10 ATM).