Thanks all. Would sleeving it harm the value, or is the value inherent in it being a 100% functional firearm? I've watched enough Antiques Roadshow to know what a bad idea it is to scrub the dirt off a colonial-era bureau or polish that old bronze statue

Other than having all work done by a highly-skilled gunsmith, is there anything that I should avoid doing at all costs (refinishing the stock, rebluing, etc)? Honestly, even if it's OK to fire, I've got plenty of other shooters in my collection and I'd be fine if this hangs over my fireplace instead.