Entry versioning history only shows last 10 versions
I don't think Craft has any other place for viewing old entry versions. You can browse the entire set by examining a table in the database, or write a plugin to display all of them.

Quick and Dirty

If you're just digging into this specific entry, you can pop into the craft_entryversions table and search for the entryId matching the one in question. You'll see all versions past and present, each with a bunch of JSON in the data column with that version's content.

Let's say you fancy one of those entries and its id column is 346 in the database. As you've already discovered, you can modify the entry's edit URL from...

/admin/entries/projects/1234-gobias-industries-about-page

...to...

/admin/entries/projects/1234-gobias-industries-about-page/versions/346

...and view it from the Craft control panel.

This is a bit uncomfortable of course, but you can quickly share a bunch of URLs with your client that'd make it easy to visit and inspect each version.

Slower and Cleaner

Otherwise you'd have to whip up a plugin to display additional version details in the control panel, probably linking to each version for further examination. If you're comfortable taking a stab at the plugin, it'd be fairly quick work displaying the results of craft()-&gt;entryRevisions-&gt;getVersionsByEntryId() however you like.

Versioneer

I just made a quick Field Type plugin for this. It's v0.0.1, but it may be worth checking out!

https://github.com/workingconcept/versioneer-craft-plugin