The Eterna 1466U watch movement, introduced in 1966, features a balance with either two or four sunk adjustment screws, Kif-Duofix combined settings for the seconds and escapement wheel, a barrel with jewel bearings, a rotor with a heavy-metal weight, a self-winding gear made from beryllium bronze, and an indirect minute with clearance-free gear. The movement encompasses automatic functionality and includes a sweep second hand.