Sofia Invisible Setting watch in 18 kt white gold and alligator strap Function Hours and minutes display Technical specifications 18kt white gold Black alligator strap Gemstones Movement Electronic quartz movement powered by a 1.5 V battery Caliber: ETA 901.001 Swiss Made Dimensions: 13 x 15.15 mm Quartz frequency: 32,768 Hz Number of rubies: 3 Case 168 colorless diamonds, rectangular and trapezoidal, baguette cut: 4.47 ct Color range: D–F Clarity range: Flawless–VVS Dial 76 colorless diamonds, rectangular, baguette cut: 2.98 ct Color range: D–F Clarity range: Flawless–VVS Crown 8 colorless diamonds, trapezoidal, baguette cut: 0.11 ct Color range: D–F Clarity range: Flawless–VVS 1 colorless diamond, round, red cut: 0.04 ct Color range: D–F Clarity range: Flawless–VVS Closure: deployant clasp 38 colorless, rectangular, baguette-cut diamonds: 0.89 ct Color range: D–F Clarity range: Flawless–VVS