Any Older Rolling-Block Rifle SMEs?

[NotYetGecko45]

Got a rolling block rifle given to me quite a few years ago - figured it would be time to find out what it actually is.

Last time I was back home I did some research on it, found some Naval markings - not sure if they were Brit or American, but it is definitely a mid-1800s version at least. No aperture sight on it, had some cheap calipers to measure the bore diameter and it is over .50cal, I assume .58 Berdan given how old it is. Mechanically it is sound, not that I would trust shooting anything out of it.

My question is, if I could get some good detailed pictures of the rifle, would anyone be able to identify it? Or at least point me in the direction of some good resources to do my own research?

It is in original condition, which is to say decent amount of battering done to it and no refinishing. The metal wasn't rusted or pitted, probably could use some TLC from someone who cares about these sort of things, it's currently in a closet in VA. If it is of value I'll probably sell it.

Thanks in advance!

[1gewehr]

Post the pictures and we'll give it a good try? 

If you haven't already looked here, it's a pretty good primer on the Rolling Block.  Amazing service longevity from 1865 - 1918.  Especially considering that it spanned from the muzzle-loading era into the smokeless repeating rifle era.

https://en.wikipedia.org/wiki/Remington_Rolling_Block_rifle