Cuckoo shop clock

Product Name: Cuckoo shop clock
Black forest made in Germany by Schneider. I DONT KNOW MUCH ABOUT CUCKOO CLOCKS. But I can try to answer questions as best as I can.. This one comes with 2 weights. Im not sure how to set them up or how to even set the clock up. I saw the clock working when was on my grandmothers wall. A bird pops out and the 2 birds at the bottom move to feed the baby's in the nest. I know these clocks go for a decent Amt. So shop Im open to offers and gonna price it as tho it might needs to be repaired even tho Idk if it does. It was packed nicely in a box after she passed and I never got around to learning how to set up.