Otherwise, you operate this Oris like an ordinary wristwatch. The day-night display occupies a little window here: if the aperture is orange, it’s OK to phone home if it’s black, your family is probably asleep. The subdial at 3 o’clock shows the time in the wearer’s home time zone. A practical detail: the date display automatically switches either forward or backward when the hour hand passes midnight. This functions very well, although the user must exert a bit more force than expected. A quick clockwise twist overcomes a spring’s resistance and triggers the ordinary hour hand for the local time to leap ahead one hour a counterclockwise turn makes the same hand jump back an hour. ![]() Spiralling lines, like a turbine’s blades, cover this rotatable ring and give the bezel a non-slip surface that makes it easier to turn. The Oris Big Crown ProPilot Worldtimer perfects the concept because the bezel now takes over the function formerly performed by somewhat bulky-looking push-pieces. Even the date display automatically switches in both directions to show either the next date or the preceding date. Oris addressed this problem in 1997 and created the Worldtimer, a watch that lets its wearer operate two push-pieces to reset the local hour either forward or backward in full-hour increments. If the central hour hand is adjustable in full- hour steps, you still need to pull out the crown first – and if you mistakenly pull the crown into the wrong position, you run the risk of setting the time incorrectly or temporarily stopping the watch. ![]() ![]() They often have a 24-hour hand that can be reset in single-hour increments via the crown, but a watch of this kind may be better suited for frequent long-distance callers than for frequent flyers because when you’re spending time in a foreign country, you want to be able to read the local time from the ordinary hour hand in 12-hour format. But not all of these time-zone displays operate intuitively. A second time zone indicator ranks among the most useful watch complications, and not just for pilots and other people who fly frequently.
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