Please help me with the breed of this chicken.

[Kjrapps]

Hello, I purchased some chicks this spring. I bought what I thought were silver laced Wyandottes. One of the chicks looked totally different from the others. It was a chocolate brown color. Cut to now when she is 20 weeks old and clearly not a Wyandotte. Any guess on her breed. I’ve googled until my head hurts and I can’t figure it out! Thanks in advance.

 

[RoostersAreAwesome]

Partridge rock

 

[JedJackson]

Partridge rock

Yep! Partridge Plymouth rock.