[Eliot Ness]

I had an old Brunswick with a broken spring years ago.  Often they're broken near the end and if you take them apart you can make the broken piece match the end and reattach it.  By now I'm sure there are more write-ups and maybe YouTube videos.

I was successful in repairing mine and it sounded great (same size/style as yours).  The repair, was however, like wrestling with a 50' anaconda covered in black grease.  Since it was your grandparents it would be nice to repair it.  Those old 78's are fun to listen to.