What breed is my chicken?

[Sam307]

In April I had bought what I thought were two white leghorns at TSC but this last week one started laying eggs and it for sure laid a brown egg because I witnessed it happen and it's the only one laying in my flock of six. They are about 18 or 19 weeks old, tell me what you think they might be. Much appreciated!

 

[sourland]

I believe that they are white rocks.

 

[Sam307]

That's what I was thinking, it seems that there are not many pure white breeds that lay brown eggs. The one that's laying has laid six days in a row and today laid a double yolked egg. I wanted some white eggs but I'm not upset they are pretty cool birds. Thanks for your reply!