Very nice find Ron & you are right it is not coded. They look to be engraved clay and very unusual that the white chip only would be inked in RED. IMHO they are very worthy of a new code. They are also interesting in that they do not fall exactly into one section or catagory. They could be coded as PD Design but also and more likely that they would be placed into the PL Plant section as a Three Petal but there is nothing that comes close to the design in the Ivory petals or engraved clay petals... but it is not exactly a Plant.
I sure hope you have extras?