There are too many details that reveal is it is a prop and not functional.
-The labeling is made from clear adhesive stickers.
-The slight orange peel texture, along with the thicker raised edges reveals that it was painted. Not a plated metal.
-The black weathering effects appear to be painted on top of the surface.
-The key holes appears to be just an embossed detail. The center pin isn't even the same on each.
-The right side keyhole is on the wrong side of the arms to be near the prawl.