Welcome to the Marble Connection Standbyme,
Benningtons from your Dad--Very cool.
I would put them back in the jar as remembrances.
These are collectable, mostly as a cool display in a variety of instances and with a variety of folks.
There are some that show more or odd colors that are desired by marble collectors.
I agree with Al --these are quite common.
Show us what else you have and expect the best of ID's on them.
Once again, welcome to you and as always--
Marble--On!!