Pendulum is wood with adjustable leaf to keep the right time. Clock has 1 day Rack strike movement that means the automatic rack strike, no matter in what direction will make it impossible to get out of strike, no matter what direction the hands are turned, on a full hour the clock always with strike right again.
Come with original instruction manual (See pics). The back of the clock is stamped "Made in West-Germany" A common way of marking German made products from 1952 to 1955. So this Cuckoo Clock may fall into this time line.
If you are a collector this ones for you everything works and will make a nice piece in a collection.