Tantalum case in 44mm. Manual winding prototype calibre 1619 in 18K rose gold. Double barrel, minute repeater, tourbillon with <<Remontoir d’egalite>> rotation in 60 seconds. Front dial display time and 2nd time zone. Hours and minutes of sidereal time. Sunrise/sunset. Day and night indication. Moon phases. Power reserve. Case back indications: Annual calendar. Equation of time. 758 components. Unique piece Available for auction; estimate US$300,000 to 600,000.00