There is a very similar gun here at the East Hartford Cabelas. The case hardening coloration on the portion of the action that slides rearward looks pristine, but the bluing on the barrels does not loom quite as good. The action opens using what I can only describe as a "toggle",instead of a bolt.
They have it tagged as a Darne Type 10 and asking $3,599.99

Funny, I'd never seen anything like it before this topic was posted. Then I walk in the store and see something very similar.