Update on my blue and white vase

Yes, I agree. And my item is earthenware. Yet the shape is not to be found elsewhere.

 

I started this inquiry after hours of dead-end research on my part hoping someone would know with a fair degree of certainty what I have. In the process I have learned a few things but if I were to offer it for sale on ebay how should I describe it?

 

I would simply say delftware, which describes a style rather than an origin.

Although delftware is called after the dutch town of Delft, it is not 'Delfts', which is the proper term for blue and white ceramics from Delft.
So delftware is a generic term, which you can use without knowing the exact origin.

 

Thanks.