That's a nice rifle with some great history. At one point my father had an M1 rifle from World War II buy trades it for a hunting rifle, bad move I have always thought. The oldest rifle I have is my great grandfather's 22 long rifle. The rifling is mostly worn off so it doesn't shoot straight, but it's has a bit of an ornate finish. It's a family heirloom now and hopefully will stay in the family for generations to come!
You know a rifle is well-uswd when the rifling isbwirn down. It's sounds like your .22LR has been put to good use by your family and imagine all the great times has with it over the years; a good family heirloom for sure.