Pretty cool rifle, with a dinged muzzle - needs some crown work.
Appears quite "early". I gt that impression from the barrel key with escutcheon plates holding on the forend along with the mounts and scope.
I suspect the forearm sling swivel likely goes through a "key" under the barrel, not just through the wood.
Is there a screw under the forend cap, like on the Ruger International models?