I had this Primo Carnera appearance poster for a while. It was splitting on some of the folds and the right edge was intact but folded under giving a ragged appearance. I had it linen mounted.
Before:
After:
I did not opt for any restoration work because I think a 60 year old poster should show some age if it was honestly acquired.
Work was performed by Poster Mountain in Northridge, CA, and I highly recommend them.