Thanks for the reply, Longtom.
It is octagonal, 24", takedown, and the serial number confirms it was made in 1900. I know the stock has been stripped, but not sanded, and recoated. When I got the rifle a few years ago, the original takedown style mag tube was cut off just inside of the forend and a section of non-takedown magazine tube was spliced on which extended to the muzzle. I had a new reproduction takedown mag tube made, left in the white, which is shown in the pictures.
I'll take some closeups of the receiver and barrel, especially inscriptions, etc., and post them soon.