The last image shows other evidence of die cleaning also. Bay 7 shows line in an opposite direction and bay 11 show another raised area. I feel these are not devices hubbed. Just gas bubbles and our minds playing tricks with us. The size of the anomoly we think we see is to narrow to be a statue. There is also another raised area above the there. So I feel it is just our imaginations playing tricks on us. If it were a statue it would be stronger. The bars on the 6 & 7th columns are stronger in appearance and usually seen on the 6th bay. I would keep for now, but I feel it is gus under the plating or an area on the bays that was disturbed during a cleaning/polishing. You might want to see what another might say about it? That is just what I see on your coin.