Ulysse Nardin Marine Torpilleur Annual Chronograph

Ulysse Nardin's Marine Torpilleur Annual Chronograph, reference 1533-320LE-3A-175/1A, is a chronograph with a 44 mm steel case. The case measures 13.66 mm thick and pairs a stainless steel build with a sapphire crystal. Inside is the self-winding calibre UN-153, which runs at 28,800 vph with a silicon escapement and holds a 53-hour power reserve. The blue dial carries a chronograph with small seconds at 9 o'clock, along with an annual calendar showing months and a date at 6 o'clock. This is a limited edition of 300 pieces. An alligator leather strap completes the watch. Ulysse Nardin rates the case to 50 metres.