Quick release and full release THB Santos hollow belt quick release series first release parameters are synchronized with genuine products. Case diameter 39.8 mm movement Swiss Ronda 4S20 modified mechanical movement Case thickness 9.08 mm Dial color Hollow dial shape Square SKU black silver silver ring silver The rose ring silver gold ring strap is made of imported Italian calf leather, the buckle is made of Cartier's original buckle, the back is through the lens, sapphire mirror hands, blue burnt steel blue hands, the black model uses imported green luminous crown, gem-set crown.