Not much finish remains on that particular example. Some guns live hard lives. The chamber length would have been marked on the flats at the proof house, either 65 (short) or 70, or 2 3/4. The original bore size at time of proof will be marked as well, using that you can determine if the bores have been honed or otherwise tampered with.
The sling is repairable, the butt plate can be replaced, but, none of that will be free. You still have a gun missing most of its finish at that point. Quite usable, but not a collection focal point, so to speak.
I suppose it all comes down to if you can make use of the gun. The design itself is trouble free.
Good luck.
Best,
Ted
