Art Deco porcelain half doll. Columbine/Columbina?

I don't really need anything on this, but I'm listening if there's info to be had. This came from an aunt's estate and hardly takes up any room in the china cabinet. It stands about 2 7/8" high. The back in marked Germany and there's a four digit mold number 57(1?4?)3 (the 3rd digit is obliterated by one of the mounting holes).