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. Blue with applied luminous round, baton and triangular yellow gold indexes, outer minute/seconds division. Luminous yellow gold skeleton hands. Cal. 3135, rhodium-plated, oeil-de-perdrix decoration, 31 jewels, straight-line lever escapement, freesprung 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.

Ref Variations: 16628B,