Oris 771

Oris 771, based on the SW 510, measures 30.00 mm in diameter (13 1/4’’’). It features central hands for hours, minutes, and 1/4-second chronograph, along with two sub-dials for running seconds and a 30-minute counter. It includes a fine timing adjustment, stop-second function, and automatic winding with a signature red rotor, providing a 48-hour power reserve.