In Addition, it includes a date function, and that is useful at three o'clock. Its sapphire display can't be scratched, keeping the watch safe from every day dress in and tear. The Ballon Bleu that has a tourbillon bears the reference variety W6920105 and it is the collection's watchmaking masterpiece. https://www.watchesworld.com/our-watch-picks-for-a-stylish-spring/