The Jaeger Lecoultre 880G mechanical watch movement features Seiko-Diafix combined settings for the escape wheel and 3rd wheel, as well as a ball-bearing rotor. It is equipped with a sophisticated excenter self-winding mechanism with just one gear stage, and early samples of the movement come with a larger rotor. The movement offers various functions, including automatic winding, sweep seconds hand, a day display in two languages that can be set using a pusher at the 2 o'clock position, and a quickset date function.