20″ Concertina was advertised by Valentine in 1958. She could be purchased in her Swan Lake costume, or in a gift set with several extra outfits. She has a hard plastic body with jointed knees and ankles, and a vinyl head with rooted hair and sleep eyes. Her “Swiss musical movement” I think would indicate that it is wind up rather than battery operated. If you have this doll, or any more information, please leave a comment and tell us about her.