Looks like a Nude Woman lying on the sand. Lots of marks on the bottom: I Q 5 18 Accolay and the diamond shape symbol for Accolay Pottery in France. Don't know much about it. Can't find another just like it on the Internet.
The item "Vintage MCM RARE Accolay French Studio Art Pottery Vase w Nude Woman France" is in sale since Saturday, January 5, 2019. This item is in the category "Pottery & Glass\Pottery & China\Art Pottery\Studio/ Handcrafted Pottery". The seller is "jan-knox" and is located in Knoxville, Tennessee. This item can be shipped to United States.