Polished 18kt yellow gold case. Polished 18kt yellow gold \Twinlock\ crown featuring two sealed zones when the crown is screwed down: the first inside the tube of the crown, the second inside the winding crown itself. Polished 18kt yellow gold fluted bezel. Polished yellow gold hands, hour & minute hands. Fine printed minute/seconds track. Features: Day of the week window displayed at the 12 o\'clock position. Date window displayed at the 3 o\'clock position with a cyclops magnifying lens. Instant & simultaneous day & date change at midnight.""