It looks like a Crusades themed pewter chess set. There are probably many different manufacturers and I can't place this one.
As a sentimental set, I think it's very nice that you will make a hanging chess board to help display it. It's a great story. I hope you'll post a picture when it's done.
My partner inherited this chess set from his grandfather. It has sedimental value to him as they played it together as a child. He wanted a way to display it and still play, so I am currently 3D printing a vertical chess board for the wall. I would love to learn more about it as I’m investing a lot of time into the board for it. Any help would be greatly appreciated. Thanks!
I have a new account so it won’t let me post pictures yet, but they can be viewed here:
https://imgur.io/a/fxHMUSU