Thanks Guys.
Yeah, I'm pretty stoked about it. Its probably from the late 1870s with a 6XXX serial number range. Who knows why the barrel was cut back, damage? muzzle wear? , maybe just to make it easier to carry on horseback. Regardless, it was done and long time ago and its part of its history. On the plus side, the bobbed barrel made it less collectable and more affordable - cost was comparable to a modern Pedersoli roller. The loading components and equipment are not inexpensive, but I knew that going in and accept it. It is tapped for a tang sight and I tthink they are factory tapped by the location. But won't know until I get it in hand and measure the spacing and thread pitch, which should be 10-28. Here are a few more photos.