Regula 72/17 Mvmt is an 8 day musical cuckoo movement with dancing platform that has a pendulum length of 40 cm, a plate size of 115 mm by 77 mm and requires 3 weights of 1750 grams each (can be purchased separately). The dancing platform on this movement measures 81 mm high from above the hand shaft. Regula 72/17 Mvmt comes complete with a bird rod, chains, stop rings, weight hooks, hand nuts and an extended post for music drive gear.