In a case such as this, I'd be inclined to skip re-writing the 10 years that were lost. I don't think anybody would complain if you just continued from 1948(?) without worrying about the lost decade. Write it off as a fire at the CBC main office having destroyed that part of the history books.
On a related note, I'm shocked that OOTP doesn't run backups more frequently than, apparantly, once every second month.