This is an older shot of the dome top casting. The give-away is the piece of steel with the nice bend sort of above the top casting and the stack diamond: This piece is half of the hatchway into the top of the tender tank, and was welded to its mate back in November, 2011. The two pierced ears protruding into the hole of the dome top are where the draw-bolts go that hold the assembly together.

Photo by Rick Brigger(?)