Breguet 581

Breguet Caliber 581 is an ultra-thin manual-winding movement introduced in 2013. Measuring just 2.35mm in thickness, it belongs to the brand's 500 caliber family and is produced in-house. The movement incorporates a silicon hairspring, chosen for its magnetic resistance properties. It powers the Classique Extra-Plate 5157 and 7147 and remains in production.