blue with red and white pot with lid

This pot was found wrapped in a cellar of a house being demomilitioned.  I don't know a thing about it, but it is in very good shape , no cracks or chips.  Just curious about it, cuz it is very beautiful.  It is marked M2312 under lid and undr pot itself.  See pics.

Anything you can tell me about this would be helpful,  Like what is it?  Is it cermaic or clay?

Thanks for your info in advance.

Isabel