31-jewel Cal. OPXVIII self winding chronograph movement, shock resistant suspension to monometallic balance, circular black dial with tachymeter scale enclosing luminous baton numerals with arabic noon and six o’clock, luminous hour and minute hands, polished steel sweep hands, subsidiary continuous seconds and 30-minute register, within a cushion form case with screw down back, polished circular bezel, round chronograph pushers and locking crown on case band, tab lugs, maker’s leather strap and brushed steel deployant clasp, together with spare rubber strap, spring bar tool, screwdriver, protective case cover, tag, original packaging, wood display box with guarantee and instruction booklets, case, dial and movement signed.