Parker GH 10 Gauge Info and Value

[BorderGuard]

Hey everyone,

This is my first post on your forum and I'll admit, I'm kind of out of my element here. I generally collect Savage 99's and Top-break Smith & Wessons, but I recently came across this Parker Bros. double barrel, and I'm hoping someone here can help me out. Thanks to your website, I think I have figured out what it is, but I'm not sure of the value. It's a 10 gauge and I believe it's a GH Model with Damascus barrels on a size 3 frame, manufactured in 1897 with a weight of 51.5 ounces and 32" barrels???? Can anyone verify this from the attached photos? What do the letters 'D' and 'C' stand for on the barrel flat? Can anyone tell me if the recoil pad is factory? Also, can anyone give me a ballpark value? The guy who owns it had it appraised, but in this area, I don't think there's many that know much about these shotguns and I'm thinking the guy went to the Blue Book, as he appraised it at $2500. To me, that seems like a pretty generous appraisal compared to the few I've been able to find on the auction sites, but maybe I'm missing something on this particular shotgun. Any help you Parker experts can give me is appreciated and I thank you in advance for your time.