Three-body, polished and brushed, screw-down case back and crown, fluted bezel, crystal with cyclops lens. Silver with applied yellow gold triangular indexes, outer track, aperture for the date. Luminous yellow gold alpha hands. Cal. 1160, rhodium plated, 26 jewels, straight line lever escapement, monometallic balance adjusted to temperatures and 5 positions, shock absorber, self-compensating flat balance spring.