Getting specific revision via http with VisualSVN Server
Better late than never; https://entire/Path/To/Folder/file/?p=REV
?p=Rev specifies the revision
Dunno if you've already found the answer to this question but in regular svn server on apache you can get to a particular revision with:
http://host/svn-name/!svn/bc/REVISION_NUMBER/path/to/file.ext
- host & REVISION_NUMBER are obvious
- /path/to/file.ext is relative to repo root
I've never used visualsvn so your mileage may vary.