505SR1

Self-winding Caliber 505SR1, numbered and signed by Breguet. Displays retrograde seconds engraved on the movement face, 14½ lignes, 38 jewels, and a 50-hour power reserve. Features an inverted in-line lever escapement with silicon pallets, a silicon Breguet balance spring, a 3Hz frequency, and 6-position adjustment, shown from the dial side.