R AL 27 PS

Caliber R AL 27 PS. Automatic movement featuring a minute repeater with dual traditional gongs and a 12-hour alarm. Includes an aperture for chiming mode display and small seconds. Measures 30 mm in diameter and 8.23 mm in thickness, comprising 561 components. The winding system utilizes an off-center 22K rhodium-plated gold minirotor with yellow gold accents, hand-engraved with the signature of Mr. Philippe Stern. Operates at a frequency of 21,600 semi-oscillations per hour (3 Hz) with a power reserve ranging from 43 to 48 hours. Features a tourbillon escapement.