@Walter Hinteler,
It appars that theeum wil take the Gerlitts bequest and, as I thought I understood: THEY WILL attempt to repatriate those works that were indeed looted by the Nazis.
Apparently, one work attributed to Matisse (I think) was found to hve been looted from Paris Art Dealer named Rosenberg. Goering apparently , not a Matisse fan, used the work in a trade for something else so that's how Gerlitts father got it.
So the Bern Museum (heres where I lost something in my sloppy translation ) WOULD SEEK TO REINSTATE THE WORK to the Rosenberg heirs.
Bern museum seems to be taking the bequest seriously.