The Ultramatic Diamond Bay Special Edition is our newest version of the popular Ultramatic. It features a real Co-Axial Tourbillon movement, featuring Sapphire crystal, Exposition caseback, Premium leather strap with a solid steel Deployant Buckle, 316L Stainless Steel, 5ATM water resistance, Diamond Cut hands and Swiss luminous pigment. Its dial features genuine white freshwater pearl. Specifications Case: 316L stainless steel Size: 42.5mm diameter Dial: Metallic multi-layer with applied index and hydraulic compression. Genuine freshwater pearl layer with CNC engraved radial pattern at 12h. Hands: Diamond cut hands with Swiss TriTec luminous Thickness: 13mm Lug to Lug: 50mm Crystal: Sapphire with Anti Reflective coating Caseback: Exposition caseback Movement: Peacock 5211 Co-Axial Tourbillon movement with manual winding, 29 Jewels Frequency: 21,600 bph Power Reserve: 40 hours Functions: Hour, minutes, power reserve, 24 hour indicator Strap: Quick-release spring bar (easily interchangeable) with solid Deployment Buckle Strap width: 22mm measured at the lugs Strap material: Genuine calf leather Buckle: Deployant Clasp Weight: 100.5 gr Note: Steel bracelet is optional