Regula 25/24 Mvmt is a 1 Day Musical Cuckoo Movement with a dancing platform. that has a pendulum length of 19.5 cm, a plate size of 73 mm by 73 mm and requires 3 weights of 320 grams each (can be purchased separately). The platform on this movement measures 58 mm high from above the hand shaft. Regula 25/24 Mvmt comes complete with a bird rod, chains, stop rings, weight hooks, hand nuts & an extended post for music activation lever.