Chrono 4 Bellissimo in the vitré version, reveals through the sapphire crystal back secured by 4 screws the finely crafted movement that animates this particularly fascinating timepiece. Also available only to order the “Coeur Vitré” version made in steel or 18 ct pink gold. An exclusive model with a precious “heart”: its refined movement, finely hand crafted with spiral motifs, can be seen through the sapphire crystal caseback, as well as the special oscillating weight.