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The Breguet Reine de Naples day and night includes a technically and artisanally complex execution. Driving a massive comparative to proportions stone set disc including escapement and balance in a relatively small calibre. The watch has a combination of materials and techniques highly diverse but well integrated, from guilloché, engraving to stone setting plus lapidary. The calibre is assembled and adjusted by hand with certain elements held in place by screws holding bridges from both sides due to the limited space and complex forms.