Very nice coupler. No signs of any wear at all. It has some very minor rust areas inside. The depressions may be good as they would retain grease. There are no protrusions. Nothing bent. It has been bead blasted.
Up!
It is hard to figure out what the second picture is showing. It is a view of the inside of the outer parts. The hole is for the grease zerk. The slight corrosion hurts nothing. There is no wear.