Sounds like you have a sporterized US M1917 rifle.
Many of these have been turned into sporters by removing the rear sight, and grinding off the protective "ears" that surrounded the sight.
The keys are the markings you can see:
1059695 stamped on the right side of the receiver ring is the serial number, and will have "US Rifle Model 1917" and the makers name stamped just above the serial number, under the scope mount.
In this case it'll almost certainly be Remington-Eddystone as indicated by the "E" and "EA" stamps.
The barrel was made in 9-1918, and this is likely the original barrel.
During WWI the 1917 was made by Winchester, Remington, and a Remington owned company, Eddystone.