You have a lot of good ideas here.
My husband looked awhile a few years ago to find the right case to go on the wall with a glass front to display his father's military medals. It looks so nice on the wall.
My father years ago made my mother a big wood display case with a glass door to put all the bells she collected. My youngest sister has that case now since they have both passed on, and that case is full of bells from all over the country.