Stainless steel, self-winding, vertical double-ellipse-shaped and curved, water-resistant, gentleman's wristwatch, case-back with 4 screws, guilloché engine-turned dial and two horological complications: Two-time zone (apertures at 6 and 12 o'clock; hour hand adjustable with the rectangular push-piece at 4 o'clock), Diurnal (day-time) an.cturnal (night-time) indication (aperture at 12 o'clock)