Sorry don't know the age. It came into our shelter about 3 weeks ago very dirty and skinny. It's looking healthier since I put it on medicated chick feed. It was one ugly chick.
It could be a RSL though it seems to have too much white forward and I am by no means a breed expert. I hope it is what you want. Enjoy it no matter what it is as the eggs will be good. Good luck and happy chickens to you. Jim