Really? They probably came from Hoovers. They don’t list mottled java on their website.
Edit: But looking up that breed she does look like one.
I'm not seeing any other mottled breeds on Hoovers website. So either one of those, or from another hatchery, or something they don't have listed on their website but did ship in an assortment.
I agree that she looks like a Mottled Java -- though they are rare and few hatcheries carry them.
Mine is a moderate layer of medium-brown eggs and a DETERMINED broody.