The present Breguet Réveil du Tsar reference 5707BA, dating to 2007 and offered as a complete full set, is a highly impressive and technically sophisticated example of Breguet’s modern high-complication watchmaking. Originally sold new in Japan in 2007, this watch represents one of the manufacture’s most distinctive alarm wristwatches, combining classical aesthetics with remarkable mechanical ingenuity. Executed in 18K yellow gold, the case appears to be unpolished and is preserved in outstanding overall condition, retaining crisp lines and sharp detailing throughout. The watch presents in top condition and shows only minimal signs of careful use. The dial is beautifully executed with hand-guilloché decoration, showcasing Breguet’s traditional engine-turned craftsmanship and providing exceptional depth and refinement. Powering the watch is an automatic movement incorporating Breguet’s proprietary mechanical alarm complication, allowing the wearer to set and activate an acoustic alarm—an uncommon and highly desirable feature in traditional haute horlogerie. Despite the lack of documented service history, the watch is in perfect working condition at the time of cataloguing, including full functionality of the alarm mechanism. The watch is fitted with a brand-new brown Breguet crocodile leather strap, paired with a yellow-gold Breguet deployant clasp, completing the ensemble with full material and aesthetic coherence. Delivered as a full set, this Réveil du Tsar represents a rare opportunity to acquire a top-condition example of one of Breguet’s most technically and visually distinctive modern complications. Combining alarm functionality, classical guilloché artistry, precious-metal execution, and outstanding preservation, this Réveil du Tsar 5707BA stands as a compelling and highly collectible modern Breguet, equally appealing to connoisseurs of traditional complications and contemporary high watchmaking.