I had a custom request for these cufflinks when my client saw James Bond wearing them in Casino Royale. I had no exact image of them other than the one movie still, so I had to guess at their exact form.
The client loved them and I then made a couple of variations (not shown); both had a circular base, one plain and the other with 007 inscribed on them.
See them in my store on Shapeways.
James Bond in Casino Royale