Oval Platters

I dont know anything about the first piece other than the first date stamp  which is from 1875-1907 

and the other date mark is from 1886 I cant find the pattern anywhere .Im just trying to find out more about it .

I also have another Dunn Bennett piece that says dunn bennett patent unchippable surface burslem .

I would be gratefull if anyone can tell me anything about these pieces.