CASE: Three-body, polished and brushed, screwed-down case back and crown, crown protected by the crown guard, graduated unidirectional revolving black bezel for the decompression times, sapphire crystal with Cyclops lens.DIAL: Black with applied yellow gold luminous round, baton and triangular indexes, outer minute/second divisions, aperture for the date. Luminous yellow gold skeleton handsMOVEMENT: Cal. 3135, rhodium-plated, oeil-de-perdrix decoration, 31 jewels, straight-line lever escapement, monometallic balance adjusted to temperatures and 5 positions, shock absorber, self-compensating free-sprung Breguet balance spring.Dial, case and movement signed, in very good conditionDIAM: 40 mm. THICKNESS: 13 mm.