View a drawing in a prior state?

I know this is a tough one, but I was hoping someone smarter than myself could answer.  Is there anyway to look at a drawing in a prior state?  Say I wanted to see what it looked like 2 months ago.  And then again just one month ago.  I found a great app called HISTORY that will show each line being drawn one by one, but I can't seem to find anything else that is even close to what I would need.  Any help would be greatly appreciated.  

Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.Image may be NSFW.
Clik here to view.

Image may be NSFW.
Clik here to view.