303 British,
The "Spencer" name was used as a trade name by various makers over the years. Sort of hits a hot button for American buyers. I did some digging and came up with at 6 different makers.
Keep asking questions. If you can, post some pictures. A 90-100 year old sxs is not the same in every respect as the guns of today.
At the very least have a good sxs gunsmith look it over. If someone has messed with the chambers or chokes, make sure they did not do a hack job on the barrels and grind away an unsafe amount of metal.
Even if the gun is pristine, modern loads are not always safe in these older guns. There are enough examples of split barrels and cracked frames around.
These guns are a learning curve. It is a steeper curve if you don't have some one to ask questions of. I am still learning.
Pete
