My dad just dug a model 1898  30-40 out of the basement. The best he can remember is he bought it in 1964 from an "old guy" he worked with for $25. It is in very good condition from barrel to stock. It is marked US-30 on the barrel. Serial number is 101280. It has a 4x Burris scope off-set mounted. It seems to be fully functional-waiting to get ammo to fire it. Any insights and information would be greatly appreciated as this isn't a model/make I'm familiar with.

Thanks.