It's looks like a sporterized Lee Enfield. Can you post some better pictures of the stamping on the receiver? Can't really make it out. There were a number of a variations to that particular rifle but I've never seen one one with the forend cut so short
Lee-Enfield of some variety that is sporterized. A very tactical weapon in WWI. Origin caliber in most is .303 British. That one is perhaps a SMLE (short magazine lee enfield) no.1 mk IV. Value is $200-$400.
.303 British details Very similar ballistic performance to the 30-06 Springfield. Even have a pic of a rifle with that monstrosity of a rear sight. I bet it is good out to 4 or 500 yards in the hands of a competent and highly skilled marksman.
No collector value but a tough rifle. All of the British commonwealths used this type of rifle at one time or another. Wars and skirmishes all over the globe. No telling where it’s been. 303 Ammo can still be found but don’t know how expensive it may be.