Acquired from an estate years ago. The numbered anatomically correct skull on the base is early. From my research, He made a few early skulls, then he started numbering them until he got to 100. He called these the plain brown skulls. The top of this one has a chip as pictured. The second one is more of a shift topper size and style which his work was known. Price is $2500 each. Message me if you’re interested ,