Order Now! ✅ 30-Day Free Returns ✅ 2-Year Warranty ✅ Free Shipping Worldwide. TSAR BOMBA Dark Matter 2 Square Men’s Watch Set, which includes 2 strap and 2 bezels. Featuring TSAR BOMBA’s patented interchangeable technology. You can quickly swap out bezels and strap without tools. Instead of buying multiple watches, why not own one that can transform into various styles? The titanium case and skeleton dial design allow you to see the movement directly and experience the charm of precision mechanics in action. Powered by a Seiko Epson movement, A power reserve indicator is positioned at 12 o'clock; the stable movement delivers a power reserve of 50 hours (±10%). A 24-hour display dial is located at 6 o'clock, while a visible tourbillon is featured at 9 o'clock. The Dark Matter 2 features Grade A luminescent coating, scratch-resistant sapphire crystal, and a interchangeable fluororubber strap. Water-resistant to 100 meters (10 ATM).