This is one such egg. It is a partial titanosaur egg, with a small section of skin as well as a couple bones exposed, along with the egg shell and sub-shell membrane. I've also been told that the skin on my specimen is different than the skin found in most of the eggs, which may mean it is a different species of sauropod or perhaps a different section of skin. The entire fragment is about 3 inches long.
(above, left) A close-up of the skin section. It was made as an impression in the fossilized sub-shell membrane. (above, right) A close-up of the two confirmed areas of bone. The first section is in the upper left corner of the picture angled down and to the right. The second is in the right-center of the picture and appears as two straight lines at a small angle to each other. (below) The full egg fragment. The skin section is on the bottom in the center. The pieces of bone are in the center-right and upper left of the egg.