I am not an expert by an stretch of the imagination, but from what I know these are pretty rare:
1886 with a 36" part round part octagon barrel It is the rifle pictured on p.332 of Maddis' Winchester book.
1873 SRC with factory 24" barrel. From what I have been told this may be 1 of only 2 in existence
1886 T/D Deluxe in .50-100 450 Express
I have my camera with me and I am going back to see the fellow - unfortunately my battery is low!