Tsar Bomba Atomic Series Automatic Exhibition Face and Back Watch with red and black interchangeable dial, Two Fluoro-rubber bands red and black and crowns to match, rectangular face and sapphire crystal Express Yourself With Color Tsar Bomba helps you express yourself with color. With patented Quick Release technology your whole look can change in 30 seconds. Water Resistance: 10 ATM/10 BAR Automatic Movement: Citizen Miyota 82S0