Rustic solid brass functional vintage skeleton key doorknocker / door knocker

This could easily be buffed back to brassy shine but its old and that's up to the new owner. This solid piece of hinged metal is a doorknocker (as demonstrated in the video) Skeleton key is hinged secure and backplate shaped like a large keyhole & secures with the holes to screw into a surface. No makers mark EXCELLENT weight My folks had this on their door and removed it when paiting the house the drip color on the back....its served its use well.