The Junghans J42 is a mechanical watch movement that was used during approximately 1952. It was produced in large quantities, with over 47,000 units manufactured. The movement, known as Model 21, features a Breguet hairspring, providing enhanced precision. Elgin's records indicate the existence of around 2,000 samples from 1952, and further production runs from the same year resulted in an additional 14,000 and 31,000 samples. The records, however, do not mention the specific grade. The Junghans J42 movement is characterized by its manual winding mechanism, sweep second hand, and the availability of options such as a hack feature and a 24-hour display.