It’s a reflex sight, but mounts between the stock and receiver so it’s low down with your typical line of sight.
A quick google search shows that a Bullard Repeating Rifle in lever action could be worth a fair amount of money.
http://www.icollector.com/Outstanding-Bullard-Repeating-Arms-Co-Large-Frame-Lever-Action-Rifle-Documented-in-Bullard-Arms_i9387530