Caliber: Calibre 2160Functions: Hours, minutes, small seconds on tourbillon carriage, tourbillonDiameter: 31mmThickness: 5.65 mm thickPower Reserve: https://www.zegarkirolex.to/ Winding: Self-winding with a peripheral rotorFrequency: 18,000 vibrations/hourJewels: 30Chronometer Certified: NoAdditional Details: Interchangeable blue calfskin leather strap https://www.zegarkirolex.to/kategoria-produktu/gmt-master/ with grey stitching and blue rubber; https://www.ukrolexshop.to/product-category/gmt-master/ self-interchangeable titanium Grade 5 folding clasp