The Fleurier 6720 watch movement features a pin-lever escapement and utilizes an indirect minute hand friction clutch on the barrel. It allows for the second hand to be stopped independently while the movement continues running. Some early samples of this movement were equipped with Palierfix combined settings instead of proper shock devices. There are varying balance cocks, and the specific differences between the 144 and 145 variants are not known. The Fleurier 6720 movement was formally known by its previous designation, Rego 13'''22. As a simple manual-wind chronograph, it offers a 60-second timing function with start/stop capability but lacks a reset feature. The movement also includes a sweep second hand. It was commonly used around the 1960s.