USN NAVY VINTAGE MILITARY BRASS PLAQUE SUBMARINE FLOTILLA TWO SUB GROUP 2. Made of heavy brass and measures about 5 3/4 wide and is in good used vintage condition with age appropriate wear see pics. This is great hard to find collectible Submarine plaque to add to your collection. Get images that make Supersized seem small. Showcase your items with Auctiva’s. Track Page Views With.