The swivel on the barrel was something I noticed as well. There is one on the stock, but I suspect it is not original, it was loose and looks more recent. The one on the barrel caught my eye as my other 219 does not have it. I have the book you sent me, from just before your latest edition.
I did order a ladder for the rear sight from Numrich, and I am guessing it is a flat stamped one, so I will keep my eye out for the milled one. I also ordered a butt plate from them that they said was for 219's, hopefully the screw holes match up. I pulled the stock off and stripped off the varnish from it and the forearm, and sanded out those numbers stamped in the stock, as well as the carrying grooves and scratches. I put a walnut stain on it, and some True oil and it looks way better now! There is a small crack in the stock, which seems pretty typical for these guns. I did see some rust on the action when I had the gun apart, which I cleaned up as well, but the rifling in the barrel is shiny, with no pitting.
I will send it off to my gunsmith soon to get it drilled for a scope rail, and I am looking forward to seeing what it does with the reloads that I found worked well in the other 30-30 I have. Thanks for all your advice as always!