You have a Birmingham Small Arms Co. (BSA Co.) Mk.1 No.III* Lee Enfield imported from Englandicon by (I believe) Centennial Arms Ltd. in Vermont. The upper handguards have the wooden "wings" either removed or broken off but that's not uncommon. If the numbers all match (ie: bolt, receiver, nose cap, rear sight, etc) then you have a nice collectible. In pristine condition, it would look like this.