Vacheron Constantin Heritage 89010 Starry Sky Series Carved Case True Tourbillon, featuring a fully automatic true tourbillon movement, double-sided blue aventurine crystal glass, moon phase and star calendar energy display multifunctional tourbillon. Style: Manual winding mechanical, skeleton case. Material: 316 stainless steel. Diameter: 42mm, Thickness: 12mm. Movement Model: Energy display true tourbillon movement. Power Reserve: 72 hours. Glass: Double-sided sapphire glass. Strap: Italian genuine leather. Buckle: Original butterfly clasp.