While using mod_svn module for apache you have access to the repository not onl via SVN client but additionally directly via HTTP utilizing the same URL. You simply obtain a plain directory listing showing the Mind revision in this situation.

It's possible (might be via URL parameters) to gain access to older revisions from the SVN repository when they has internet been replicated/labeled inside the SVN?

I understand that you will find third party software that enables to do this like ViewCV or WebSVN however i am thinking about what lengths you receive with merely a plain SVN repository accessible via mod_svn and HTTP(S).

You should use the r querystring parameter to gain access to older versions of files and directory entries with mod_dav_svn. For instance:

http://host.example.com/repos/project/trunk/README.txt?r=1234

The SVN Book has more particulars on the salt water evaporates.