The Omega 343 watch movement, introduced in 2002, is an automatic chronograph with a variety of functions. It includes a 60-second, 30-minute, and 12-hour counter, all controlled by a pillar wheel. The movement also features a fly-back feature, allowing for quick resetting and restarting of the chronograph. Additionally, it has a sub-second subdial, a perpetual calendar, and multiple pushers for setting various functions. The day of the week can be set using the pusher at 8 o'clock, the date using the pusher at 10 o'clock, the month using the pusher at 1:30 o'clock, and the moon phase using the pusher at 4:30 o'clock.