11" Automaton Singing Birds in Cage Music Box 20th Century Made in Germany
The two birds inside are red and yellow colored and real plumage. They sing tuneful both and the condition are very well.
Unmarked under the base but we saw on Internet that Karl Griesbaum made this kind of automaton.
If you want to see them working, i could make a video for you.
For other info please contact me.