Some versions of the Chiappa Rhino are double-action, but you have to admit it’s different.
From what I’ve read, all versions of the revolver are double-action. All double-action revolvers can be fired in single-action mode, but that’s not really what I was thinking about.
It is an interesting design though - probably the only major (ie, not largely based on internal workings) revolver design development in more than a century, I’d say.