Platinum double-faced hunting-case manual-winding vertical double-ellipse-shaped skeleton 8-day going gentlemans wristwatch hinged case-back water-resistant with sapphire-crystal case-back subsidiary seconds at 6 and a one-minute tourbillon regulator eccentric dial and seven horological complications: Instantaneous perpetual calendar à guichets (with apertures) Date of the month (subsidiary dial at 6 oclock) Day of the week (aperture at 9 oclock; indications given in English) Month of the year (aperture at 3 oclock; indications given in English) Four-year cycle of leap-years (subsidiary dial at 6 oclock) Phases of the moon (aperture at 12 oclock) 8-day power-reserve indication (aperture at 12 oclock on the front face dial)