PARMIGIANI FLEURIER TORIC HÉMISPHÈRES RÉTROGRADE
The Toric Hémisphères Rétrograde is the ultimate traveller's timepiece. With its two time zones, it allows any two locations to be paired, and correct to the nearest minute. It even allows those locations with a half-hour or quarter-hour difference to be paired with full hour times set from the Greenwich meridian. A module is indexed to the main movement in order to govern the second time zone. By pulling out the small crown at 2 o'clock, the module is disengaged from the movement, meaning that it can be adjusted independently of the second time zone, to the nearest minute. When the crown is pressed back in, the movement and the module re-engage and the second time zone is re-indexed to the first so that they operate simultaneously with the desired interval. The main crown at 4 o'clock is used to wind the movement and set the time of the two paired time zones, such as the date. Each of the time zones is associated with a window, which provides the day/night indication so that the time of day can be read in an instant for each time zone. The calibre PF 317 also features an instant retrograde calendar, indicated by the third central hand. As it moves towards the last days of the month, the hand activates a spring which drives it back to number 1 with great force. This 240° movement is so fast that it cannot be seen with the naked eye. This self-winding movement has a double series-mounted barrel for improved isochronism and rate regularity, with a power reserve of 50 hours.