The ETA 2520 watch movement, introduced in 1971, features a Triovis micrometer regulator for precise timekeeping. It is an automatic movement with a sweep second hand and a quickset date function. The movement also includes a hack feature, allowing for precise time setting. It incorporates Incabloc Shock Protection for increased durability and reliability. The ETA 2520 movement is equipped with a stop seconds function and sweep seconds. Additionally, it includes a calendar with quickset for convenient date adjustment.