Need assistance on Asian marking

[Beans]

I normally do not buy glass, porcelain etc. At the TS picked up this ashtray, one because it is an ashtray and then noticed the markings on the bottom.
Tried researching but do not have the slightest idea on what to search for. Any help would be appreciated.

Do I have a Ming Dynasty most valuable ashtray in the world or a place to put my pennies?

 

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[Mackaydon]

It appears to be DELFT Blue; European, not Asian. Although the Delftware potters preferred to call their earthenware “porcelain”, it was only a cheaper version of the real Chinese porcelain.
Don.....

 

[Beans]

Thanks Mackaydon. I was not even in the right part of the world.

 

[Mackaydon]

It is DELFT Blue; European, not Asian.
Don.....
Some history:

Delft is a tin-glazed pottery that has been made since the seventeenth century in Holland. Delft was made in England in the eighteenth century. It is decorated with blue on white or with colored decorations. Real delft is a soft, easily chipped pottery. Twenty-first century so-called delft is often porcelain. Most of the pieces sold today were made after 1891, and the name Holland usually appears with the Delft factory marks.

 

[Mackaydon]

The "CS" are the date letters. (1973)
Don...