Isn't it sad that there really aren't any firearms that exist today that are worthy of buying and holding onto so you could pass them down to your children? I know you can spend big bucks on a Les Baer or a Korth revolver, but imagine bequeathing your Glock or M&P? Look at the box and the accessories. It looks like it belongs in a museum.
OP, if you dad ever shot that gun I would shoot exactly one cylinder in his honor and then clean it, wax it, and put it away. If there is no carbon rings on the front of that cylinder than that is exactly how I would leave it, unfired.
A friend of mine is a retired FBI agent. He had the opportunity to buy FBI marked Model 27's (maybe 28's). They came in a beautiful wood box. Consecutive serial numbers. He's never even opened the cylinders on them. He's got one for each of his kids. Sad thing is his kids don't care about guns, so they'll probably sell them to pay their rent one day.