Case: Three-body, solid, polished and brushed, screwed-down case back and crown, Triplock winding-crown protected by the crown guard, graduated bidirectional revolving gold bezel with 60-minute scale engraved in relief, sapphire crystal with Cyclops lens. Dial: Mother of pearl with applied luminous triangular markers and yellow gold round, triangular and bton indexes, outer minute/ seconds track, aperture for the date. Luminous yellow gold skeleton hands. Movement:Cal. 2135, Rhodium-plated, oeil-de-perdrix decoration, 29 jewels, straight-line lever escapement, free-sprung monometallic balance adjusted to temperatures and 5 positions, shock absorber, self-compensating Breguet balance spring, Microstella regulating screws, hack mechanism. Dial, case and movement signed. Diam:34 mm Thickness 11 mm Dial, case and movement in good condition