If a piece of Harker dinnerware is not marked pate sur pate, can it still be pate sur pate? In particular, I am speaking of the Chesterton/Corinthian teal green dinner ware made by Harker. I have seen pieces marked Harker with the “oven proof ” mark and no “Pate Sur Pate” described as Pate Sur Pate. What is correct?