Welcome aboard! Do you have pictures that you could post?

To get the age we need the numbers and prefix and you can xx out the last two. So something like S1234XX would help.

Generally rebluing hurts the value. My thought is this - It's your gun and you can do what you want with it. But if it were me (and it's not) I would leave it as is. He worked really hard over many years to get it in that condition, each scratch was a from him. I'd just leave it.

Others will be along shortly to assist after you post the full number.

Oh and it does not have a safety, but should have a hammer block safety so it does not go off by accident if dropped on the hammer for instance.