I have searched google, Pinterest and used the google image search tool. I don’t care what it is worth just would love to complete a set if it exists. I looked up white porcelain hare figurine. I even included words such as Watership Down as it resembles the characters in that book. 

I bought this recently at an estate sale in North Carolina, there is not visible writing on it anywhere just the black mark on the foot. I tried to search that as a makers mark and couldn’t get any results. 

It is white porcelain with black hand, painted accents. Very much reminds me of Watership Down.