The Fontainemelon 90-4 watch movement, introduced in 1974, is equipped with a Triovis micrometer regulator for precision adjustments. It is an automatic movement with a sweep second hand and features a day display with quickset function in two languages, as well as a quickset date function. The movement also includes a hack feature, Incabloc Shock Protection, and a calendar with quickset capabilities. The Fontainemelon 90-4 movement has been used since 1974.