Cuckoo retailer clock

Product Name: Cuckoo retailer 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 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 retailer she passed and I never got around to learning how to set up.