H Herr KW80 is a Hubert Herr 8 Day cuckoo movement with a pendulum length of 31 cm, a plate size of 85 mm by 90 mm. H Herr KW80 requires 2 weights of 1500 grams each and comes complete with bird rod, chains, stop rings, weight hooks & hand nuts. H Herr KW80 has 7921 BPH.