Have you seen this Masonic Ring?

Has anyone seen a Masonic Ring like this one?
It was shown in the movie "National Treasure".
It appears to be a swivel ring, but I am not sure.
The round head with the square outline around the S&C is interesting.
Any thoughts where I may find such a ring?
David Vukovic
Gray Lodge #329
Houston Texas

I've seen them on eBay in the past. I think
the sellers were in England.

Here are some similar rings to choose from:
Masonic Rings Super Store - Freemason Rings!

Flip rings:
Masonic Rings Super Store - Freemason Rings!