Wow, there are some breeds that really don't look like they've changed much, and others that look like different breeds!
I LOVE the old boxer and bull terrier. Especially the bull.
The clumbers look like they may have once actually been able to move and hunt!
I find the English bulldogs interesting - they still look very much like EB to me - the pushed in face, the bow legs, and yet they are just enough lighter in build that they look much more athletic than the current ones. It makes me think that some vast improvements could be made to their health and well-being without totally changing the look of the breed.