.30-06?
US 1917 very thoroughly sporterized.
Triggerguard & floorplate straightened, receiver sight and "ears" removed, receiver bridge recontoured, barrel at least draw filed if not turned, ramp front sight installed. Drilled and tapped for scope mount and sporting receiver sight, bolt jeweled, sporter stock. Pretty good example of say 40 years ago, then not thought to be a Bubba, they were cheap.
Likely made at Eddystone, based on the "E" on the trigger and safety. Maker's name under the front scope base.