It's great that they've made it to such an old age! Testament to some amazing careIf I find any future green eggs it will definitely confirm since I know the breeds of all the other hens in the flock. Haven't seen a green egg in close to a year though, and we did have a few other unknown hens pass away in that time since the flock is all pushing 8 years old or more. Looking back, one of the ones that passed was definitely an EE.
But it's certainly still possible! She does look a whole lot like pictures of Easter Eggers that I'm finding. You all are pointing me in a good direction, I'd say!