How old is this Clock

by Julie M
(Illinois)

I was given a clock that was passed down from my aunt, who passed away years back. The clock seems to be old, but I don't know much about it.

It is made in Germany, has a key to wind it up, and pendulum - it is like a tiny mantle grandfather clock, in a way. It is made of brass and has stamped "Made in Germany." Can anyone help out?

Thank you.