I have had this music box since I was quite young (1960's). The angel is missing her wings, some of her hair, and she should be holding a little Christmas tree. Also, there is a small tree missing from the base. But it still plays! In fact, I just set it out on the mantel and the start pin slipped out enough that it started on it's own.
I can remember taking the base apart to "see how it worked" when I was a kid. I'm glad I didn't tinker with the moving parts and break the music box.
In the background you see a small feather tree that is about the same vintage, and one of the lamps that used to grace my Grandma Dixon's bedroom dresser.