Well, I started a thread on this same subject a long time ago (it was the first thread I started if I recall), but I want to actually be able to use this thing, so here we go again.
The gun is a Crescent SXS Shotgun chambered in 16 GA. I do not know what model it is, but it has exposed hammers on it. The barrel has no markings on it at all (we had to test fit different GA until we found one that fit. 12GA was too big, 20 Ga was to small, 16 Ga was just right).
Anyway, it has several parts missing from it. The entire fore arm assembly is gone (including the piece that has a circular cove cut into it and fits against the end of the reciever), a spring for a hammer is missing, the firing pins are free floating (I don't know if they had springs origionally, but if they did, their gone), and the entire extractor is gone (plate, spring, and anything else I'm not aware of)
I cannot find these parts anywhere. Should I have them custom made? Where could I have that done, I don't even know what many of these parts looked like.
If I get that problem solved, how should I refinish it. The cold blue works, but is not very attractive. Should I just have it parkerized, or something else (I want the gun to look as origional as possible. So I want it a really deep blue with maybe some gloss to it)
Oh, and finally, the gun was made before the mid 1930s (that is when Crescent was bought buy savage/stevens (I think). There was an old scrap of paper that was between the stock and the buttplate that was dated 1902 (I think, I'll have to check). The barrel is not damascus, or twisted metal, I think it was solid. Would this gun be safe to fire? Should I just use reduced loads or black powder loads, or should most modern ammo be fine?
For everyone that thinks I ruined an old gun by refinishing it, the gun was covered in thick rust when I got it (mostly surface rust, there is only a little pitting), I'm just giving it a new life.

Plus the gun is not very collectible, and worth very little money even in decent condition.
I'll post some pics of the guns, and it's parts when I get home. Thanks.
This is what it looks like. (this is not mine though)