Antique German 400 Day Anniversary Dome Clock Ball Disc Brass 4-3/8"

Measures 4-3/8" tall and weighs 3oz. The spring at the top appears to be messed up. Sold as is for parts or repair.
I've recently acquired a portion of an estate from a local clock maker who has passed away. Though i don't know too much about these items I am trying my best to represent them accurately. So if I've missed any information or you'd like more pictures or details don't hesitate to ask!
I absolutely combine shipping wherever possible if you're interested in multiple items!