What a great story. Did the petite sporting lady shoot it much? Gun may not command a premium price on the market because of alterations but since you know its history, that might be more more important to you anyway. You seem to know something about double guns to go to trouble of testing and finding POI. In my opinion on alterations, wear, superficial knocks and dings, its a mind over matter issue. If you don't mind, it doesn't matter as long as you appreciate what it is.
I hope you enjoy the gun and get to make your own stories with it, it does sound like an incredible upland gun perfect for quail, grouse, and woodcock terrain and cover. I would be proud to be a steward of that gun as you described.
Btw here is gun for Sale at Kevins. Does this gun resemble yours.
http://www.kevinsguns.com/product-p/3-101679.htm
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