Digging some more in the Yard of Western Quarry I found these out of place dots / keys. After asking Mike & Walt found out they were used in a restoration project in Avalon / Catalina. When I got them they were without a glaze but the Tile Studio found the job in a book and glazed them accordingly.
I was digging around the yard and came across these pieces (separately). They were made for the restoration of the Wrigley Pool Coping on Catalina Island. I am looking for pictures of the project but no luck. If you are inclined please help me.