When I got her, the person seemed vague. They said she might be a Buff Orpington X so that's what I've always called her. But having seen purebred Buff Orpingtons, I'm now unsure. Could she be the golden variety of the red sex-link??
Her color looks like blue partridge but I don't know what breed besides Wyandottes come in that color (her single comb pretty much eliminates that as a possibility). The pic is of a pair of Blue Partridge Wyandottes --
I have two buff orpmix pullets that have that same feather pattern. They're both 1/2 sumatra, so must be that color patern is on the orp side. Although one has the golden lines in her feathers and one has white lines. But the pattern is the same.