Good on you , sir.
And my condolences as well.
Those are 2 wonderful pieces and I'm sure they're a joy to own, regardless of the circumstances of their coming to you. (That said, I CERTAINLY your willingness to trade them to get your father back. You have wonder about someone who wouldn't.)
My teenage son has 6 long guns of his own.
One day, he'll be the recipient of many more upon my passing.
I received one of my grandfather's many guns upon HIS passing in 1968.
My son and I (even at his age, he's level-headed to the point of suspecting his being a mutation
have decided to institute for ourselves an age-old european family tradition, that of the "Family Weapons". When I pass on, he'll then be the owner of his father's arms and all related equipment, i.e., reloading, etc. As I've trained him of the use of all the aforementioned, he'll do the same for his offspring when he himself becomes a father. When he passes, the chain will continue ad nauseum.