Thanks for the pic. Faceted pontils are notoriously tough to photograph and it's hard for me to tell for sure. It does look like it's a flat spot, but it seems a little off to me.
This is a lot of marbles for one post. It makes it hard to keep track of them and describe which is which. Although, most look like newer Marble Kings to me.
If you reduce the size of you browser window the pics will get smaller but the text will stay the same size. Otherwise, you can press CNTRL and - (minus) one or more times to reduce the size of everything - text included, unfortunately.