Traditional Delft, and what most people look for is a white glazed earthenware with the cobalt blue or what is known as Delft Blue, painted in metal oxides and glazed again. Very similar to Majolica,, it is a tin glazed pottery !! Although it was begun in the 1600`s around Amsterdam and the city of Delft,, it was also produced in England, Scotland, France, Italy, and late 1700`s and 1800`s was also produced in China and Japan. The Chinese and Japanese then exported it back to Europe !! You can see why some if unmarked are often thought to be the traditional Dutch Delft who used many similar Chinese and Japanese patterns on their early pottery !! Later they did go back to the traditional Dutch scenes !! It can get confusing !!