The tonneau shape takes on a new look in this model. The steel case with engraved back is fitted with an Ons 581 automatic movement indicating the moon phases, day, date and time in a second 24-hour time-zone. The guilloché dial features luminous hands and hour markers under a spherical cut mineral crystal. Water-resistant to 30 m. Comes on a matching bracelet with invisible folding clasp or on a leather strap.