Agreed. She is very pretty and would make a great layer. I also see a bit of white in the earlobes which says hatchery chick or mix to me.Single combs pop up now and therm in pure lines due to the genetics involved.....a good breeder removes the bird, and parents, from the line... which is why its more common in hatchery birds where quantity is valued over quality.
Such birds are great for production, though, so if eggs is what one is after its no big deal