This bowl is in exactly the same condition as it emerged from the kiln. Notice the dark line that looks like a crack. That stress line occurred during the firing and is not damage to the bowl.
This bottom view of the bowl shows the size of the line much more clearly. The mark does detract from the value of the piece so that will be reflected in its price.
Looking down into the bowl you can see that the line is evident inside and out. Below I am going to show you a similar mark in another piece of the same time.
Note: the 3 pictures below are of a different bowl being offered by a well know international antique company for $2,000.00 . I am including these pictures only to compare ours to this one. They look almost identical. The image on the left shows the same kind of dark fault line at the bottom as appears on our bowl. The image in the middle shows the same fault line along the bottom of the bowl. The image on the right shows that the two bowl look almost the same. They could have been made by the same potter at the same kiln at the same time. It is a little larger.
This bowl comes with this Certificate of Origin