From the second picture it defiantly looks like a helical style LSD as opposed to a plated one. Im looking at it on my crappy work screen.
Could even be an OEM diff
That is a plate lsd from those pictures . Can you take a pic of the cam through the side ?
I'm hopeless when it comes to stuff like this man ha. What do you mean of the cam through the side. The box is back together by the way