Craig, you are "bitten" now in the world of double guns, welcome.
You only shared two numbers of your old hammer gun, but enough to tell me it is from 1886-87 and is a Syracuse L.C. Smith. These guns were made very well and many of us still shoot them once they have been looked at by a reputable gunsmith that knows of these guns.
Good luck in your collecting and I think you did very well for your first one.