I visited that page on the gen 1 iPad in question, if I click on free download, nothing happens. If I click, download at the app store, nothing happens. If I click, read more, it takes me to another page, that gives download option,top and bottom of page, if I click either, I get redirected back to the first page, m.opera.com.
So I'm not sure of my options at this point.

I was given a first generation iPad, the iOS is 5.1.1.
I'm not sure which version of opera mini worked with this iOS but I'm certain version 9 will not.
Is it possible to find out which version worked and more importantly, still find this version for download?
I tried a few downloads titled as an older version but when I clicked on them they took me directly version 9.
Any help appreciated, thanks.