The Jeambrun 26D watch movement, in production from 1972 onwards, features a pin-lever escapement with two ruby pins, two lever bearings, two escape-wheel bearings, and one 4th-wheel bearing, resulting in a total of seven jewels excluding balance jewels. The movement incorporates an indirect second and minute mechanism, along with a ratchet on the dial side and a crown mechanism with a rocker bar. Notable functions of this movement include manual winding and a sweep second hand.