Can a post change be reverted back to its original?

[fav]

I don't think so.

you could try one of the internet archive sites, maybe one archived your OP

[fuzzy]

I just accidentally modified the post today for the 8-8-28-15 hangout (so I could then just copy and paste it into a new post for 9-4-15).  But I accidentally saved it and lost the link to the hangout
is there a way to change it back?